The above passage shows that Gretchen lacks confidence; this establishes a man vs. self conflict.
Answer: Option A
Step-by-step explanation:
Gretchen does not have confidence in him that he can perform well and thinks that others know that he performs the worst. He has lost all the confidence in him which does not let him do any efforts and stops him from going to the gymnastics meet.
If he had some confidence in him, he would have made efforts to perform well and change the perception of others regarding his performance. This lack of confidence led to a man vs self conflict where only he has to make efforts to improve himself.