This test: 27 point(s) possible This question: 2 Sub point(s) possible An object moves along the y-axis (marked in feet) so that its position at time t (in seconds) is given by f(t) = 9t - 9t + t+ 7. Find the velocity at three seconds. O A. 190 feet per second O B. 192 feet per second O C. 109 feet per second O D. 197 feet per second