Each of two boxes contains three chips numbered 1,2,3. A chip is drawn randomly from each box and the numbers on the two chips are multiplied. What is the probability that their product is even?
Answer Choices
A. \dfrac{1}{9}
B. \dfrac{2}{9}
C. \dfrac{4}{9}
D. \dfrac{1}{2}
E. \dfrac{5}{9}