The discrete time Fourier coefficients of ( _{m=- }^ [n-4m] ) is __

1.	The discrete time Fourier coefficients of ( _{m=- }^ [n-4m] ) is ____________
A.	( frac{1}{4} ) for all k
B.	( frac{1}{4} ) for all k
C.	( frac{1}{2} ) for all k
D.	( frac{1}{2} ) for all k
Answer» C. ( frac{1}{2} ) for all k

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