4. Which of the following are valid differences between signed and unsigned variations of the same integer type in a 2's-complement implementation of ANSI C in an embedded system?

A. The range of the unsigned variation of an integer type is twice that of the signed variation.
B. A small negative signed integer will be read as a large positive number if cast to an unsigned integer.
C. They have the same size, but the signed variation range is centered around 0 (zero), and the unsigned variation range has a lower bound of 0(zero)
D. The range of the signed and unsigned variations of the same integer type are equivalent in size and numeric maximum and minimum.
E. The representation of a signed integer has one additional bit for the sign.
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FROM 1.147.112.*