If x and y are integers, and , which of the following statements must be true?
Indicate all such statements.
A. If w is even, then x must be even.
B. If x is odd, then w must be odd.
C. If y is odd, then w must be odd.
D. If w is odd, then y must be odd.
답이 abc 인데 설명좀 부탁드려용 ㅠㅠㅠ