Answer:
All cells have an outer plasma membrane that regulates not only what enters the cell, but also how much of any given substance comes in. Unlike prokaryotes, eukaryotic cells also possess internal membranes that encase their organelles and control the exchange of essential cell components.
Mitochondria...
Mitochondria are known as the powerhouses of the cell. They are organelles that act like a digestive system which takes in nutrients, breaks them down, and creates energy rich molecules for the cell. The biochemical processes of the cell are known as cellular respiration.
It sounds most like a generalized anxiety disorder but there could also be some OCD in there.
Pretty shore the answer is D
Doing research about the company that sent you an email will help you understand what you would be going into. Contacting them to verify will also help you be safe and not get fraud with anything.