Question

PLEASE HELP ASAP

Is the set of multiples of 4 closed under addition? Explain why or provide a counterexample if not. A. Yes, because the sum of any two multiples of 4 is also a multiple of 4. B. Yes, because the sum of any two multiples of 4 is also a multiple of 8. C. No, and a counterexample is –4 + (–8) = –12. D. No, and a counterexample is 26 + 16 = 42.

Answer 1

this is kind of hard but the answer is its a because 4 is a multiple of 4  

Answer 2

The answer is a. I hope that helped