Which sentence uses coordinating conjunctions correctly?

A) My family got me a new bicycle for my birthday, nor I didn't really want a new one.
B) The little dog was lost, but he seemed scared and nervous when the man picked him up.
C) My friends are not cruel people, but they often do volunteer work for the local food bank.
D) Wayne felt homesick for his family while in Vietnam, yet he tried to enjoy his time overseas.