Ummmmmmmmmm..... chewing?
I am pretty sure the answer is D (combination)
Answer:
Because T-cell-independent antigens do not activate helper T cells, they fail to induce B cell memory, affinity maturation, or class switching, all of which require help from T cells. They therefore mainly stimulate the production of low-affinity (but high-avidity) IgM antibodies.
Explanation:
The color changes from clear to blue, then once heated to orange.
I did this experiment not too long ago so hopefully this helps! (:
