calculus

When an object is dropped straight down, the distance in feet that it falls in t seconds is given by s(t) = - 1612, where negative distance (or velocity) indicates downward motion. Find the velocity and acceleration at t = 8 O A. Velocity = - 32 f/sec; acceleration = - 256 fu/sec O B. Velocity = - 32 fu/sec; acceleration = 0 ft/sec O C. Velocity = - 256 fu/sec, acceleration = - 32 fu/sec O D. Velocity = - 256 fu/sec, acceleration = 0 fu/sec