Listen to the audio and then answer the following question. Feel free to listen to the audio as many times as necessary before answering the question. When is this conversation most likely taking place?
(Audio given to you)

A) por la mañana
B) por la tarde
C) por la noche
D) al mediodía

Please help me, I tried to find something on here explaining the answer but it was no use. The audio is on Edgenuity.