A uniform cylinder rests on a cart as shown.The coefficient of static friction between the cylinder and the cart is 0.5. If the cylinder is 4 cm in diameter and 10 cm in height, which of the following is the minimum acceleration of the cart needed to cause the cylinder to tip over ?
(A) 2 m/s2
(B) 4 m/s2
(C) 5 m/s2
(D) the cylinder would slide before it begins to tip over.