Is the Risk of Disaster from Asteroid Impacts High or Low

Multiple Choice

Is the risk of disaster from asteroid impacts high or low? Choose the best answer.

A) relatively high because although large asteroid impacts are rare, they can cause catastrophic effects such as mass extinction
B) low because asteroid impacts only cause damage in a very local region
C) high because large asteroid impacts are fairly common
D) low because there are only two documented large asteroid impacts in the Earth's entire geologic history
E) No one really knows because asteroid impacts are completely unpredictable.