The correct answer is A. sang.
The sentence “A: Were you singing when I came in? B: Yes, I sang.” is in the past tense. This means that the action of singing happened at a specific time in the past. The verb “sang” is the past tense form of the verb “to sing.”
The other options are not correct because they are not in the past tense. The verb “was” is the past tense form of the verb “to be.” The verb “were” is the plural past tense form of the verb “to
288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube