If the difference between the roots of the equation $x^2 + ax + 1 = 0$ is less than $\sqrt{5}$, then the set of possible values of $a$ is :

Question

( A ) $(-3, \infty)$
( B ) $(3, \infty)$
( C ) $(-3, 3)$
( D ) $(- \infty, -3)$