A Car Travels in a Flat Circle of Radius R

Multiple Choice

A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 24 m/s west, and the total acceleration of the car is 2.5 m/s² 53° north of west. Which of the following is correct?

A) R = 0.29 km, and the car's speed is increasing.
B) R = 0.23 km, and the car's speed is decreasing.
C) R = 0.23 km, and the car's speed is increasing.
D) R = 0.29 km, and the car's speed is decreasing.
E) R = 0.29 km, and the car's speed is constant.