Each of the following 15 cards has a letter on one side and a positive integer on the other side.
What is the minimum number of cards that need to be turned over to check if the following statement is true?
“If a card has a lower case letter on one side, then it has an odd integer on the other side.”
Answer Choices
A. 11
B. 9
C. 7
D. 5
E. 3