which sentence uses formal language?
a) i hated studying grammar when i was in school.
b) have i convinced you that the study of grammar is important and well worth your effort?
c) you are probably wondering how all of the rules and their exceptions will be remembered by you.
d) english is a very tricky language loaded with many rules and just as many exceptions to those rules.

the legal limit for the drivers who can drive after consuming any amount of alcohol is 21 years.

explanation:

on november 1, 1996, a "zero tolerance law" was put into effect in the new york state.

according to this zero tolerance law, for people under the age of 21 years, it was illegal to purchase and possess alcohol or to drive after consuming any amount of it.

also, the alcohol involvement rate for the drivers under the age of 21 was roughly twice that of elderly drivers.

the answer would be b.