Scientists Have Used the Fossil Record to Estimate the Average

Multiple Choice

Scientists have used the fossil record to estimate the average length of time that a species inhabits the Earth. This estimate is useful for assessing the impact of humans on the Earth's biological diversity because it can

A) help determine how long the human species might survive.
B) determine which species might become extinct soon, even if humans aren't involved.
C) estimate how many species extinctions are caused by human activity.
D) assure us that human activity is not the cause of most species extinctions.