Meteor shower debris is believed to come from:
A) The asteroid belt when Mars deflects it toward us annually
B) The core of a differentiated type M asteroid, now broken up
C) The crust of a differentiated type C asteroid, now broken up
D) The disintegration of a short period comet over many returns to the Sun
E) Deep space, far beyond the solar system, defected by the gravity of another star
Answer: D