No one would anticipate that my case would snowball into one of the most famous trials in history.
句意：没人能想到我的案子会如滚雪球般成为历史上最著名的审判之一。snowball滚雪球般增大。 evolve发展；进化。run跑；移动。develop发展；形成。roll滚动。D选项与划线处意义最为接近，故选D。