E7F05 (B)
How frequently must an analog signal be sampled by an analog-to-digital converter so that the signal can be accurately reproduced?
A. At least half the rate of the highest frequency component of the signal
B. At least twice the rate of the highest frequency component of the signal
C. At the same rate as the highest frequency component of the signal
D. At four times the rate of the highest frequency component of the signal
