7. Let E be the set of even numbers and let O be the set of odd numbers.
Then, which of the following is correct about the relative complements
of these sets?
A. 2016 and 2017 belong to E\O.
B. 2016 and 2018 belong to E\O.
C. 2016 and 2019 belong to O\E.
D. 2016 and 2020 belong to O\E.