<span>It is produced mainly by adipocytes, but can also be produced by the placenta (syncytiotrophoblasts), ovaries, skeletal muscle, stomach , mammary epithelial cells, bone marrow,gastric chief cells.</span>
I would say all of the above
Is that an option?
According to my 9th grade biology knowledge,
The answer to this question is A: They have a recent common ancestor.
They both grow and develop.