Answer:
The professional behavior Brent is displaying is: respect for cultural diversity.
Explanation:
The type of behavior Brent is facing can be indeed quite annoying. The patience is, after all, the woman, so she is the one who should be answering the questions. However, Brent is showing a respectful professional behavior by keeping on smiling and carrying out the interview as best as he can. There may be several cultural reasons for the couple's behavior. They might be an older couple with certain old-fashioned beliefs on, or they may belong to a culture that gives men the authority to speak, etc. Even if that is strange or irritating for Brent, his ethics are undeniably of a high level, and he is showing respect.