Characteristics of fatigue-related crashes include the following except: Driver is alone
Well rested person who takes regular breaks on long trips
The vehicle leaves the intended path of travel
Vehicles traveling at higher speeds

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

the answer to this is proletariats.

hope this : )

a. vertically

explanation:

i tried it and took the test

if im wrong then we have different tests