Which sentence needs proofreading? a) jenny turned around quickly when she heard all the books on the top shelf fall down suddenly. b) having made sure that all the doors and windows in the old house were locked and unable to be opened. c) heather hung her head down and began to cry a little when she only received the first-runner-up ribbon. d) "before you leave the house today," said mrs. miniver, "you need to make sure that all the beds are made."

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.