The Authors of Your Text Present Correlational Evidence Showing That

The authors of your text present correlational evidence showing that people who are happier tend to spend more time with others.Which of the following is NOT a valid explanation for this correlation?

A) Happy people are more likely to have good relationships.
B) Good relationships make people happier.
C) There is a third variable, such as extraversion, which accounts for the correlation.
D) Social contact in any form makes people happier.