C
B
A
B
B
You're welcome, took the quiz.
Answer:
Helper T cells
Explanation:
This is because it is a type of adaptive immune system that stimulate B cells, microphages and cytoxic T cells. Helper T cells are used in different adaptive immune responses. They help to activate B cells so as to produce antibodies and also help macrophages to destroy ingested microbes. they also help activate cytotoxic T cells which will inturn kill infected target cells.
in apex the answer is : an error in dna replication would affect many generations of cells