AMC 12 2007a Problem 7

Let $a, b, c, d$, and $e$ be five consecutive terms in an arithmetic sequence, and suppose that $a+b+c+d+e=30$. Which of $a, b, c, d,$ or $e$ can be found?

$\textrm{(A)} \ a \textrm{(B)}\ b \textrm{(C)}\ c \textrm{(D)}\ d \textrm{(E)}\ e$