Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to each of the following questions.
My sister is good at cooking. My brother is bad at it.
A.My sister is good at cooking, or my brother is bad at it.
B.My sister is good at cooking, for my brother is bad at it.
C.My sister is good at cooking, but my brother is bad at it.
D.My sister is good at cooking, so my brother is bad at it.