SAT Change the Subject

Algebra Level 1

If $a = 3b - 2c$ , which of the following is an expression for $b$ ?

(A) $\ \ 3b - 2c$

(B) $\ \ a + 2c$

(C) $\ \ \frac{a+3c}{2}$

(D) $\ \ \frac{a+2c}{3}$

(E) $\ \frac{3b-a}{2}$