Find the intersection of the following sets: A={a,e,i,o,u},B={a,b,c}

Question

$\begin{array}{1 1}(A)\;\{a,e,i,o,u\}&(B)\;\{a,b,c,e,i,o,u\}\\(C)\;\{a,b,c\}&(D)\;\{a\}\end{array}$