What layer of gas molecules in the atmosphere is bombarded with rays from the sun?

Technician a says after tire service work tires and wheels must be in a state of static and dynamic balance in order to avoid vibration in service. technician b says tires and wheels are balanced at the factory and do not need further balancing. who is correct?

The us is not democratic (facts/data/information/reason to prove the us is undemocratic)

Free points + brainliest! answer this correctly and you shall receive! to obtain a class e license, you don’t need to a. be at least 16 years old b. complete a tlsae course c. pass the driving skills test d. be a u.s. citizen