Initially, there are 5 red beans and 9 black beans in a bag. Then, 3 red beans and 3 black beans are added to the bag. If one bean is randomly chosen from the bag, what is the probability that this bean is red?
Answer Choices
A. \frac{3}{8}
B. \frac{2}{5}
C. \frac{4}{5}
D. \frac{5}{8}
E. \frac{8}{17}