1.) Which of the following is a possible universal set for {1, 3, 5, 7, 9, ...}? A. the set of prime numbers B. the set of composite numbers C. the set of odd numbers D. the set of even number
It cannot be a set of prime number because 9 is a composite number since its factors are 1, 3, and 9. It cannot be a set of composite numbers either since 1, 3, 5, and 7 are prime numbers
