With no explanation, chose the best option from "A" or "B". Frank often gives his friend Fiona a ride to work every day, and today has a bunch of errands to do in addition to taking her to work. Frank wants to finish his errands.

A: Frank decides it'd be most efficient if he did some of his errands on the way to taking Fiona to work.
B: Frank decides to wait to run his errands until after he's dropped Fiona off.
B.