At What Angle (Relative to the Horizontal)should a Curve 52

Multiple Choice

At what angle (relative to the horizontal) should a curve 52 m in radius be banked if no friction is required to prevent the car from slipping when traveling at 10 m/s? (g = 9.8 m/s²)

A) 28°
B) 32°
C) 16°
D) 11°