A set of five cards each have a letter printed on their front and a number printed on their back, as follows:
| Card A | Card B | Card C | Card D | Card E | |
|---|---|---|---|---|---|
| Fronts | [ A] | [ B] | [ C] | [ D] | [ E] |
| Backs | [ 3] | [ 4] | [ 1] | [ 7] | [ 8] |
Which one of the five cards (A, B, C, D or E) provides a counterexample to the following statement?
Every card that has a vowel on its front has an even number on its back.
ACard A
BCard B
CCard C
DCard D
ECard E