Which is the only way a person can be sure to prevent a hangover?

Avoid Alcohol at all

Explanation:

Alcohol, ethanol is mainly responsible for hangover effect. The effects of hangovers are usually felt after 24 hours or a day of excessive drinking. Hangover symptoms begin when the content of alcohol in blood drops to zero suddenly. The higher the fall, the higher is the hangover. Thus, in order to avoid hangover, an individual must not consume alcohol at all.

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.

is this for the e2020 class