A Car Drives in a Straight Line on a Level $\degree$

A car drives in a straight line on a level road with a constant acceleration of 3 m/s².A ball is suspended by a string from the ceiling of the car; the ball does not swing, being at rest with respect to the car.What angle does the string make with the vertical?

A) 17 $\degree$
B) 35 $\degree$
C) 52 $\degree$
D) 73 $\degree$
E) Cannot be found without knowing the length of the string