Explain AAA $\text{'}$s rating system.

A$.$ The AAA rating system uses a classification based on hotel type such as deluxe, economy, luxury, etc.

B$.$ The AAA rating system uses a letter grade ranging from $A$ to $F$ and is a common rating system.

C$.$ The AAA rating system is based on a series of stars, with one star designating a basic roadside hotel and five stars offering the highest levels of service and sophistication.

D$.$ The AAA rating system evaluates and rates hotels, awarding rankings from one diamond $($simple roadside appeal$/$meets basic needs$)$ up to five diamonds $($highest service levels, sophistication, and offerings$).$ The five$-$diamond rating is one of the most difficult to earn.