Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions.
I had to lose some weight. I went on a strict diet.
A. I had to lose some weight after I went on a strict diet.
B. I went on a strict diet in order to lose some weight.
C. I had to lose some weight before I went on a strict diet.
D. I had to lose some weight even when I went on a strict diet.