Find the Nyquist rate and Nyquist interval for the signal f(t) = ( Big[ frac{sin 500 t}{ t} Big]^2 ).

• A. 1000 Hz, 1 msec
• B. 1 Hz, 1000 sec
• C. 1000 Hz, 1 sec
• D. 1000 Hz, 1000 sec