Final answer:
The most important factor in rating someone for liability coverage is their driving record and history.
Step-by-step explanation:
The most important factor in rating someone for liability coverage is Option 1: Driving record and history.
Insurance companies assess the driving history of the insured to determine the risk of accidents and claims.
A clean driving record with no accidents or violations generally leads to lower insurance premiums, while a history of accidents or violations can result in higher premiums.