Which of the Following Best Defines Economics

Which of the following best defines economics?

A) Economics studies how to choose the best alternative when coping with scarcity.
B) Economics helps you earn as much money as possible.
C) Economics is concerned with prices and quantities of goods and services, both at the individual level and at the industry level.
D) Economics teaches how to limit our wants.
E) Economics analyzes all aspects of human behavior in general.