Answer:
What Saj should do to help him prepare for his turn to respond is:
A. Listen carefully and take notes about what others are saying.
Step-by-step explanation:
The purpose here is to find a way for Saj to prepare for his turn, not for him to avoid it or pretend. If he must respond to at least one comment, Saj should pay attention to what everybody says and take notes. That will give him enough information to ponder and build a response around. That way, he can comfortably choose which person he wishes to respond to after having mentally prepared.
If he continues reading instead of listening, he will most likely offer an unsuitable and generic response, not closely connected to what the other student has said. If he simply finds someone who shares his same idea, there will be no challenge or growth, which renders the whole activity purposeless. If he changes the subject, again the activity will have lost its sense; nothing will be learned from it.