Rajesh and Brent live next door to each other and are both new to the junior high school. They usually walk to school together and hang out at lunchtime. Rajesh has been away for two weeks and Brent feels anxious because he doesn't really have anyone to sit with at lunchtime. We could say that he probably misses the ________ support that Rajesh and he share.
a. informational
b. instrumental
c. companionship
d. esteem