Which of the following is the largest number? A-90 000

B-9.3 x 100^-6

C-8.9 X 10^-5

D-8.9 X 10^5

I think it is B

Explanation:

because it equals 9.3e-12

After your first exposure to a pathogen, you have memory T cells that will remember the antigen of the pathogen son in the future if you would come in contact with the same pathogen your body will recognize it right away and be able to kill it much faster