Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions.
The plane will leave on time. The weather may be nice or not.
A. The plane will leave on time regardless of the weather.
B. The plane will leave on time only if the weather were good.
C. The flight will be cancelled due to the fact that the weather is not nice.
D. The plane won't leave if the weather is bad.