I believe it would be C.) Species but i may be wrong
This fossil must be younger than 475 million years old, because that is when land plants arose
The antibodies to the HIV virus may take up to three months to appear in the blood of the infected person.
Therefore, the second blood test is necessary three months after a person thinks that he/she has been exposed to HIV to check the presence of these antibodies and confirm whether the person is infected or not.
Xylem and phloem
hope u got it right
