You did not include the other part of the question but with some googling i think this answer is what you were looking for:
"to the grocery store" modifies drive. Because drive is a verb, that makes "to the grocery store" an adverb phrase.
During the early stages of the prewriting phase, writers should follow brainstorming techniques being mind mapping, outlining, and more!
It is not all of the above because c is incorrect i dont think a is right either so i would go with b good luck!
