A vessel is steering 090°T at 10 knots. The current has a set of 180° and a drift of 2 knots. Which term describes the direction toward which the current is flowing?

Why C is correct

Bowditch Ch. 23 §2302 defines set as the direction toward which the current is flowing and drift as the speed of the current. Course made good and course over ground describe the vessel's resultant track, not the current direction.