You Are Trying to Cross a River That Flows Toward

You are trying to cross a river that flows toward the south with a strong current.You start out in your motorboat on the east bank desiring to reach the west bank directly west from your starting point.You should head your motorboat

A) directly toward the west.
B) directly toward the north.
C) in a general southwesterly direction.
D) in a general northwesterly direction.