The sum of the reciprocals of the roots of the equation ax^2 \plus{} bx \plus{} c \equal{} 0 is:
(A)\ \frac {1}{a} \plus{} \frac {1}{b} \qquad (B)\ \minus{} \frac {c}{b} \qquad (C)\ \frac {b}{c} \qquad (D)\ \minus{} \frac {a}{b} \qquad (E)\ \minus{} \frac {b}{c}