It is B , I know this thanks to the fact I took PE and our teacher teach us about the body !
The placenta develops within the first couple of weeks of pregnancy. The placenta is the lifeline of the fetal body and soon after the placenta is developed and in place, it begins starting to absorb nutrients for the developing fetus. This all occurs in the first trimester.
3: opiates, came along in the 19th century..was widely used during the civil war as well..
A vegan is : They eat no animal products
Vegetarian: D<span>on't eat animals, but may eat products that come from them (such as dairy and eggs)</span>