Fat cells in the adipose layer under the skin.
The answer would be 2 placenta. A thin walled sac that surrounds the fetus during pregnancy. The sac is filled with amniotic fluid(liquid made by fetus) and the amnion(the membrane that covers the fetal side of the placenta)
Oceans , lakes, and rivers .
It would be C and D.
A is not an answer since many people drink many different types of alcohol and it doesn't mean that they are alcoholic. They are just trying new things.
B is not an answer since quitting is not a sign of alcoholism because the problem has already been addressed.
C and D are answers since alcoholism takes over someone's life so much to the point where they drink a lot. Usually it is alone since some are very embarrassed and don't want to show everyone else how much they consume due to self-consciousness so they don't go to other activities.