Use the definition of a derivative to determine whether f (x) = 8x is differentiable at x = 0. O A. Yes, it is differentiable at x = 0. O B. No, it is not differentiable at x = 0. O C. No, it is only differentiable on the left side at x = 0. O D. No, it is only differentiable on the right side at X = 0. O E. This cannot be determined.\fWhy is f (x) = (x - 1| not differentiable at x = 1? O A. The graph of the function has a corner at X = 1. O B. The graph of the function has a cusp at x = 1. O C. The graph of the function has a vertical tangent line at x = 1. O D. The graph of the function has a discontinuity at x = 1. O E. f (x) = x - 1| is differentiable at X = 1.I I 3:2 if a: > D I I Why Is the function f {x} = _ not differentiable at x = CI? 33 1 1f 2: i: D O A. The graph of the function has a corner at x = D. O B. The graph of the function has a cusp at x = D. O G. The graph of the function has a vertical tangent line at x = D. O D. The graph of the function has a discontinuityr at x = D. O E. The function is differentiable at x = D