D. Secondary sex characteristics appear.
<span>The answer is B-cells. B cells also known as B lymphocytes principal function is to make antibodies against antigens and develop into memory B Cells after activation by interaction. They also signal immune regulatory functions.</span>
the metal pin will sink. the wood will float
Answer:
I'm not sure but i think the b number is the best
Explanation:
in my opinion the internal motivation is necessary
