What are pie charts such as the one above typically used to show?

a. a causal relationship between variables, often expressed as negative numbers
b. a negative relationship between variables, often expressed as absolute values
c. a component's share of the total amount, usually expressed as a percentage
d. a pattern of similar data values, usually expressed in a shortened form

Einar sees alexandra every day across the room in his history class but has never talked with her. einar likes the way alexandra looks, including the way she dresses and how she wears her hair. he's even more attracted to her apparent intelligence and the way she handles herself in class discussions and during interactions with the instructor. he'd like to know more about her, so he asks one of his friends about her. einar, using a passive strategy to gain information about her, is probably in the preinteraction awareness stage of any relationship that might develop between them. t/f