A pathogen is:. a. a protein that displays other proteins on the surface of different cells in the body.
b. a cell that grows and divides out of control.
c. a virus, bacterium, or microorganism that can cause disease.
d. a protein that can identify infectious agents in the body.

Explanation:

c. a virus, bacterium, or microorganism that can cause disease.

The answer is obviously C

The most widely accepted theory for the formation of fossil fuel is that fossil fuel was formed over time from decaying organic matter.
Organisms died and were buried in the ground millions of years ago. Subjected to the high temperature and high pressure under the surface of the earth, the carbonaceous compounds within the organisms were transformed into different forms of fossil fuel such as coal and oil.