I would say the answer is A
It would be a catalyst. They help increase the rate of chemical reactions.
Plant cells have cell wall but animal cells don't have any cell wall.
Answer:
<h2><u><em>
Upon reinfection, the memory cells will immediately differentiate into plasma cells and CTLs without input from APCs or TH cells.</em></u></h2>
Explanation:
<h3>Hope i helped (<em>Tell me the results in the comments below pls</em>) Good Luck!</h3>
