Assuming zero initial condition, the response y(t) of the system given below to a unit step input u(t) is:

Assuming zero initial condition, the response y(t) of the system given

1.	Assuming zero initial condition, the response y(t) of the system given below to a unit step input u(t) is:
A.	u(t)
B.	(t2/2) u(t)
C.	tu(t)
D.	e-tu(t)
Answer» D. e-tu(t)