Answer:
c. He will compare himself to people with a similar background to his own.
Explanation:
According to the Social-comparison theory, we are constantly trying to have a more accurate image of ourselves. In order to do so, people make social comparisons.
When we want to see ourselves in a more <u>accurate way,</u> we compare ourselves to <u>people who are in similar situations</u> or have a similar background to our own (As opposed to comparing ourselves to people who are in a position of disadvantage compared to us and therefore, ending feeling better about ourselves).
In this example, Charles wants to see himself <u>accurately</u>, therefore, as we said before we will <u>more likely compare himself to people who are in similar circumstances</u> and therefore with a similar background to his own.