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Q. |
A normal subgroup is |
A. | a subgroup under multiplication by the elements of the group |
B. | an invariant under closure by the elements of that group |
C. | a monoid with same number of elements of the original group |
D. | an invariant equipped with conjugation by the elements of original group |
Answer» D. an invariant equipped with conjugation by the elements of original group |
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