Assume That the Average Rate of 1- Km Sized Asteroids

Multiple Choice

Assume that the average rate of 1- km sized asteroids hitting the Earth is about 1 every million years. The chance of the Earth being hit by a 1- km sized asteroid in the next 100 years is about:

A) inevitable, it has to happen sometime.
B) zero.
C) one in ten thousand.
D) one in a million.
E) one in 100 million.