What Relatively Recent Event Shows That Impacts Continue to Happen

Multiple Choice

What relatively recent event shows that impacts continue to happen in our solar system even today?

A) a large asteroid hit a town near San Francisco and made an enormous crater
B) a comet (which broke into more than 20 pieces) hit the planet Jupiter in 1994
C) one of the moons of Mars collided with Mars and made a huge explosion, sending pieces throughout the solar system
D) Pluto collided with another planet, and broke into two pieces
E) the Mt. Pinatubo volcano in the Philippines erupted in June 1991