If x(n) is the input signal of a system with impulse response h(n) and y(n) is the output signal, then the auto correlation of the signal y(n) is?

If x(n) is the input signal of a system with impulse response h(n) and

1.	If x(n) is the input signal of a system with impulse response h(n) and y(n) is the output signal, then the auto correlation of the signal y(n) is?
A.	r<sub>xx</sub>(l)*r<sub>hh</sub>(l)
B.	r<sub>hh</sub>(l)*r<sub>xx</sub>(l)
C.	r<sub>xy</sub>(l)*r<sub>hh</sub>(l)
D.	r<sub>yx</sub>(l)*r<sub>hh</sub>(l)
Answer» C. r<sub>xy</sub>(l)*r<sub>hh</sub>(l)