Face-to-face interaction allows people to have the feeling of being "in sync" with another person.The degree of ________ between people determines the efficiency and the quality of progress toward goal achievement,and whether the goal is ever achieved.

A) Janusian thinking
B) broadcasting
C) rapport
D) representational gaps

Rapport refers to a sense of mutual understanding and connection between people. This is crucial for effective face-to-face interaction and goal achievement. Janusian thinking refers to the ability to consider multiple perspectives simultaneously, broadcasting refers to the transmission of information through media, and representational gaps refer to differences in how people perceive or interpret information.