SAT English Practice Question

After finishing his shift at the grocery store, Miguel rushed to the library to finish a research paper. He had been working on the paper for weeks, but the assignment was due at the end of the day, and he was running behind. In fact, the more Miguel read for his paper, the more he realized he needed to research.

1. A.the more Miguel read for his paper the more he realized
2. B.the more Miguel read for his paper; the more he realized
3. C.the more Miguel read for his paper, the more he realized
4. D.the more Miguel read for his paper, the more he realized;