Please help with this math question guys! Thank you! (Please choose one of the provided answers)

I will mark Brainliest :)

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Im literally having a mental breakdown

Manuela claims that and are congruent. which statement best describes her claim? she is incorrect because the segments do not have the same orientation. she is incorrect because the segments do not have the same length. she is correct because the segments have the same length. she is correct because the segments have the same orientation.