a) does not form a group
b) does not have the right identity element
c) forms a non-commutative group
d) forms a group if the empty string is removed from
Consider the set B* of all strings over the alphabet set B = {0, 1} with the concatenation operator for strings ________
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Consider the set B* of all strings over the alphabet set B = {0, 1} with the concatenation operator for strings ________
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