A three-digit integer contains one of each of the digits $1,3$ , and $5$ . What is the probability that the integer is divisible by $5$ ? (2009 AMC 8 Problem, Question \#13) 
选项为:A:$\frac{1}{6}$  B:$\frac{1}{3}$  C:$\frac{1}{2}$  D:$\frac{2}{3}$  E:$\frac{5}{6}$  请回答其中一个选项.