Gabe Meets with His Boss at the End of a Busy

Gabe meets with his boss at the end of a busy day at work. He notices his boss keeps frowning as she reviews his report. Gabe thought he did a particularly good job on the report, so he can't understand how she would be displeased. Therefore, Gabe asks his boss, "Is the report what you were wanting"? His boss nods and explains that she has a headache because of the busy day; the report is fine. Gabe was able to decipher his boss's nonverbal message because of what strategy?

A) Considering the social situation someone is in
B) Keeping in mind that cultural differences sometimes influence the meaning of a nonverbal message
C) Asking a person as a way to check an interpretation of his or her nonverbal message
D) Expressing nonverbal messages