Answer:
B. The events are equally likely.
Explanation:
On a 6-sided number cube, there are 3 even numbers (2, 4, 6) and 3 odd numbers (1, 3, 5). There is a 1/2 (3 of 6) chance you will roll an even number, and a 1/2 chance you will roll an odd number. These chances are the same, so B is the answer.