THE_FUNCTION_GIVEN_BY_THE_EQUATION_X(N)=1,_FOR_N=0;=0,_FOR_N‚ÄÖ√Ñ√∂‚ÀÖ¬¢‚ÄÖ√тĆ0_IS_A:?$#

• A. Step function
• B. Ramp function
• C. Triangular function
• D. Impulse function