The answer here is B. The phrase is "on the left." It is telling you where. An adverb phrase can tell you either why, where, how, or when.
He read his textbooks carefully and made concept maps to help him remember the details. The dates were giving him trouble, though, so he tried to memorize them by reading them aloud and then saying them without looking in the book. He also made a time line and flashcards to help him remember important facts.
1. Dare not do that
2. I ought to go with my friend
3. I need the money
4. I might come here
5. Should we do the meeting
The answer is B. to record. "To" is always a part of an infinitive.
I hope that helps!
