Claire Is Out Having Lunch One Day, and Sees Her

Claire is out having lunch one day, and sees her friend Makenzie having lunch with a man Claire has not met. Claire does not interrupt them, but after watching them for a few minutes thinks "hey, they seem really attracted to each other!" Which of the following might Claire have noticed as a sign of mutual attraction, consistent with research discussed in your textbook?

A) Makenzie and the man were talking in a very animated way.
B) Makenzie and the man touched each other occasionally while talking.
C) Makenzie and the man made a lot of eye contact while talking.
D) Makenzie and the man were mirroring each others' posture and movements.