A Boat Crosses a River Which Is Flowing at 10 $\theta$

Multiple Choice

A boat crosses a river which is flowing at 10.0 m/s.The driver of the boat wants to cross the river and arrive directly across the river from where he departed (point A to point B) .If the speed of the boat relative to the river is 15.0 m/s,what angle, $\theta$ must the driver steer the boat?

A) 41.8 ^$\circ$
B) 48.2 ^$\circ$
C) 70.5 ^$\circ$
D) 36.7 ^$\circ$
E) 33.7 ^$\circ$