I believe <u>hydrologic and Rock Cycles </u>is the right answer.
C. The organism is a prokaryote
Cuz prokaryotes don't have a nucleus
plant and animal cells are eukaryotes which has a nucleus
The option which would most likely result in the greatest decrease in the rate of a chemical reaction is adding an enzyme inhibitor to a reaction catalyzed by an enzyme.
Enzyme inhibitor is known for slowing down any processes, especially when it comes to chemical reactions, so I'd say A is the correct answer.
There is the possibility but, it would take over 2,000 years