The effects of alcohol on the driver begin to decrease after...

A)Having had the last drink.
B)4 hours after the last drink.
C)1 hour after having the last drink.Correct
Alcohol can be detected in the blood 5 minutes after ingestion. Blood alcohol level rises rapidly until it reaches its maximum level, called the blood alcohol peak, between 30 and 90 minutes after intake, on average 1 hour. After that time, the effects will begin to decrease little by little until total absorption.