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Does repeating an element change a set?

AIt disturbs it
BIt does not
CIt doubles it
DIt divides it
Answer & Solution
Correct answer: B. It does not
1. A set records membership, not multiplicity. 2. Writing an element twice adds nothing. 3. Repetition of elements in a set does not change a set. 4. So the answer is it does not. _Source: syllabus Mathematics, Ch 1 'Sets'_
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