Help! Nursing statistics- wordy problem no one in the class can answer

Hi everyone! Hoping someone is able to help guide me and my classmates. Our teacher isn't great and will not assist us with this question.

Our class is torn 50/50 as to which is the correct answer: C or D

If anyone can help in any way that would be much appreciated!

INTRODUCTION: The purpose of this study was to determine the effectiveness of nursing interventions in decreasing pain for children with minor musculoskeletal trauma and moderate pain and to examine patient satisfaction. METHODS: Children were assigned to 1 of 3 intervention groups: (1) standard care (ice, elevation, and immobilization) only; (2) standard care and ibuprofen; or (3) standard care and distraction. Children were monitored for pain ratings for 60 minutes. Children who sustained minor musculoskeletal trauma within the past 24 hours and presented with pain ratings of 2 or greater using the 0-5 Wong/Baker faces scale were included. Two patient satisfaction questions were asked of parents upon their child's discharge from the emergency department. RESULTS: A statistically significant decrease in pain for all patients (76) occurred at 30 minutes (p <.05) and was maintained at 60 minutes. The distraction group demonstrated a statistically significant reduction in pain compared with the other groups at 30 minutes; this reduction was maintained at 60 minutes (p <.05). Parents of only 6 children expressed dissatisfaction with overall pain management. Twelve percent of children who were not in the group receiving medication received analgesics while in the emergency department. At discharge, only 37% of children with fractures and/or sprains had received medications for pain. DISCUSSION: Children with musculoskeletal trauma may be under-medicated. Distraction techniques can be an effective adjunct to analgesia for children with musculoskeletal pain in the emergency department and should be made available. Ibuprofen may not be an effective analgesic for children with these injuries; stronger analgesics may be required.

In light of this information we may conclude (choose the best answer AND explain why you chose that answer and why you did not choose the other answers-5 marks): a. Fewer than 1 child in 20 will fail to benefit from distraction as a means to reduce pain.
b. The chance that an individual child will fail to benefit is less than .05.
c. If distraction were effective, the probability of the reported finding or one more extreme is less than 1 in 20.
d. If distraction were ineffective, the probability of the reported finding or one more extreme is less than .05.
e. The power of the test exceeds 0.95.
It's asking you about the meaning of a p-value. Here's one definition, from wikipedia:

The p-value is defined as the probability, under the assumption of the null hypothesis, of obtaining a result equal to or more extreme than what was actually observed.
So in choosing between c and d, ask yourself: what would have been the null hypothesis for this study? That the treatment is effective? Or that the treatment is ineffective?