Adele has $1$ blue and $1$ red marble in her hand. Bobby has $1$ blue, $1$ yellow, and $2$ red marbles in his hand. Each of them randomly picks a marble to show the other. What is the probability that the colors are the same? 
选项为:A:$\dfrac{1}{4}$  B:$\dfrac{1}{3}$  C:$\dfrac{3}{8}$  D:$\dfrac{1}{2}$  E:$\dfrac{2}{3}$  请回答其中一个选项.