The correct answer is A. Eva must decide if she should finish the race despite the pain in her legs.
Step-by-step explanation:
In literature, a conflict is a struggle between one or more characters and an opposing for that can emerge from outside (external conflict) or from the character itself (internal conflict). This implies an internal conflict occurs as one person or character struggles against its own emotions, feelings, and thoughts, while an external conflict occurs as one character struggles against another character, nature, the society, etc. Therefore, the one that is an example of an internal conflict is "Eva must decide if she should finish the race despite the pain in her legs" because in this the conflict occurs between Eva's desire and Eva's feelings or body and therefore the conflict emerges from inside the character and is an internal conflict.