When a woman drinks alcohol during pregnancy, the baby is also drinking alcohol because blood freely passes from the woman's bloodstream into the fetus's blood stream?

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

it is either c or d and i know for sure it is not a or b