Final answer:
The correct answer is B. The correct response to Aisyah's statement that she can't join for dinner because she has to study for an exam is 'b. Sorry. I can't,' which acknowledges her academic commitment.
Step-by-step explanation:
The appropriate response to Aisyah's statement, "Sorry. I can't. I’ve an exam to study for," when she is invited for dinner would be an acceptance of her decision and understanding regarding her need to study. Given the context of the conversation, Amir should choose an answer that respectfully acknowledges Aisyah's prior commitment to her studies.
Therefore, Sorry. I can’t, as it indicates Aisyah cannot accept the dinner invitation due to her need to focus on her upcoming exam. Situations similar to this occur when students must balance their academic responsibilities with social engagements. For instance, in the text provided, we see students like Rania and Tui prioritizing their studies by planning to study together for their midterm, while also taking time for a meal, accommodating Rania's dietary restrictions. In another example, a student is writing to Mrs. Radway to arrange an alternative exam schedule due to travel plans, which emphasizes the importance of managing academic commitments.