Which of the Following Instances BEST Exemplifies the Concept of BUYcotting

Which of the following instances BEST exemplifies the concept of BUYcotting?

A) withholding federal income taxes to protest an unpopular war
B) demonstrating outside a local restaurant that hires illegal aliens paid "under the table"
C) refusing to purchase items from a company that benefits from sweatshop labor
D) forgoing commodities such as bananas and coffee that cannot be produced locally
E) walking several blocks out of one's way, past several other eateries, to dine at a café that serves only eggs from free-range hens