Context clues can help you figure out the meaning of a word or phrase you don’t know. These clues can be found in the words and sentences surely the unknown word or phrase.
Answer: Cell wall and cell membrane
Explanation: The cell wall and cell membrane protects the cell the cell wall gives it it's shape and the membrane controls what enters or exits the cell
B. I believe the answer is B, it is the only relative answer to the topic of Michael's paper, Hope this helps!