Why is oil referred to as a fossil fuel?

A.
Oil was formed from decaying layers of plants in swamps millions of years ago. They fossilized into oil.

B.
Oil formed from dead marine organisms that fell to the ocean floor, were covered by ocean sediments, and broken down by bacteria into oil over millions of years.

C.
Oil was formed from the breakdown of igneous rocks over millions of years.

D.
Oil was formed from black shales that were uplifted millions of years ago and fossilized into oil.

(I know this isnt math, but I really need help)

Question

Why is oil referred to as a fossil fuel?	
 
 A.
Oil was formed from decaying layers of plants in swamps millions of years ago. They fossilized into oil.
 
 B.
Oil formed from dead marine organisms that fell to the ocean floor, were covered by ocean sediments, and broken down by bacteria into oil over millions of years.
 
 C.
Oil was formed from the breakdown of igneous rocks over millions of years.
 
 D.
Oil was formed from black shales that were uplifted millions of years ago and fossilized into oil.

(I know this isnt math, but I really need help)

justdoublechecking · Answer

I believe that this would be B.

fedorable · Answer

@JustDoubleChecking  Thats what I thought as well, i just wasnt quite sure, thank you!

justdoublechecking · Answer

No problem! :)

fedorable · Answer

I changed my answer to A and it was correct.

justdoublechecking · Answer

That was my second guess...