a. The legal drinking age in the United States should not be lowered to 18 because more drunk driving accidents would occur, adults are more mentally mature at 21 years of age, and students still in high school would be allowed to buy alcohol, resulting in even more underage drinking.
II. More drunk driving accidents
a. The drinking age once was lower
b. Drunk driving accidents have increased
c. The cost of insurance will go up because of more car accidents
III. Adults are more mentally mature at 21 years of age
a. Studies of the brain show a large amount of growth between ages 18-21
b. At 21, people make better decisions. Many are close to finishing up college or have been working for a few years, so they have better judgment.