单项选择题

The passage implies that all of the following true is true concerning classical means of error correction EXCEPT

A. The string 1110 should be interpreted to represent 1
B. The string 2020 should be interpreted to indicate the presence of noise
C. A four digit code is more likely to be accurate than a three digit code
D. It is permissible to duplicate the bits in a code
E. Three digits in agreement, such as 111, indicate the absence of degradation