Which is the commutative property of the LTI System in case of discrete time system?

• A. x[n]+h[n]=h[n]+x[n]
• B. x[n]+h[n]=h[n]*x[n]
• C. x[n]*h[n]=h[n]*x[n]
• D. x[t]*h[t]=h[n]*x[n]