Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best COMBINES each pair of sentences in the following sentences I spent 30 minutes reading books. I, then, wen

Before I spent 30 minutes reading books, I had gone to bed.

While I was reading books for 30 minutes, I went to bed.

After I had spent 30 minutes reading books, I went to bed.

As soon as I went to bed, I spent 30 minutes reading books.