Which of the following happens to the graph of $y=a^x$ with $0<a<1$, if one decreases $a$?

(a) As $x \to \infty$, $y \to 0$ more quickly.
(b) As $x \to -\infty$, $y \to\infty$ more slowly.
(c) Both (a) and (b).
(d) None of the above.