A) An operation performed on members of that set will result in a member of the same set.
B) The set has a finite number of members, as opposed to being infinitely large.
C) Members of a closed set cannot be added, subtracted, multiplied, or divided.
D) An expression belonging to a closed set cannot be used to create an expression that is not of that set.
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The correct answer is:
A) An operation performed on members of that set will result in a member of the same set.
In mathematical terms, a set is considered "closed" under a certain operation if performing that operation on any members of the set results in an outcome that is also a member of the same set. For example, the set of integers is closed under addition because the sum of any two integers is always an integer.
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