Two Brief Waves or "Pulses" Are Sent Down a Rope

Two brief waves or "pulses" are sent down a rope, in opposite directions, as shown in the figure. Pulse A is 1 cm in height, and pulse B is 2 cm in depth. When they meet, they will create

A) a disturbance 1 cm high.
B) a disturbance 3 cm deep.
C) a disturbance 3 cm high.
D) a disturbance 1 cm deep.
E) no disturbance, because they cancel.