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
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