2 A: Did ancient Egyptians play board games? B: Yes, they

The question uses the auxiliary verb 'Did', indicating a past tense question. The answer should use the past tense of the verb 'play', which is 'played'. However, the options provided are 'could', 'had', and 'did'. Since the question is a yes/no question about whether they played, and the answer is 'Yes, they...', the most appropriate completion is 'did' to echo the auxiliary verb used in the question.
Answer: C did