A discrete LTI system is described by the difference equation y(n)-0.25y(n-1)=x(n)-x(n +1) The impulse response of the system is OA h(n)=0.5°u(n)-0.5"-'u(n-1) O B. h(n)=0.25"u(n)-0.25" -'u(n-1) Oc h(n)=0.25" u (n)–0.25" *'u(n+1) O D. h(n)=0.5°u(n)-0.5"+'u(n+1)

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