A “domino” is made up of two small squares: \square
Which of the “checkerboards” illustrated below CANNOT be covered exactly and completely by a whole number of non-overlapping dominoes?
Answer Choices
A. 3 \times 4
B. 3 \times 5
C. 4 \times 4
D. 4 \times 5
E. 6 \times 3