A student attempting to identify the main idea of paragraph two wrote the following sentence:

When researchers at the University of Missouri began examining trees in surrounding areas, fire damage in a Canadian forest revealed that huge wildfires in the mountains near Ontario darkened the New England skies hundreds of miles away.

Which sentence best describes the student's sentence?

Question

A student attempting to identify the main idea of paragraph two wrote the following sentence:

When researchers at the University of Missouri began examining trees in surrounding areas, fire damage in a Canadian forest revealed that huge wildfires in the mountains near Ontario darkened the New England skies hundreds of miles away.

Which sentence best describes the student's sentence?