An Object Moving at a Constant Speed Requires 6

An object moving at a constant speed requires 6.0 s to go once around a circle with a diameter of 4.0 m. What is the magnitude of the instantaneous acceleration of the particle during this time?

A) 2.2 m/s2
B) 2.7 m/s2
C) 3.3 m/s2
D) 3.8 m/s2
E) 4.4 m/s2