Which statement describes the cost to park as a unit price?

A. Ari paid 1 quarter to park for 15 minutes at a parking meter.

B. Brianna paid 30 cents to park for 30 minutes at a parking meter.

C. Caesar paid 12 dollars to park for 1 day in the airport parking lot.

D. Deanna paid 70 dollars to park for 7 days in a city parking lot.

C. Caesar paid 12 dollars to park for 1 day in the airport parking lot.

Step-by-step explanation:

Unit price : the price of first quantity per one unit of second quantity is called unit price,

In option A,

Payment is 1 quarter for 15 minutes,

This can not be unit price because payment is not given for one minute.

In option B,

Brianna paid 30 cents to park for 30 minutes at a parking meter.

This can not be unit price because price for parking is not given for one minute.

In option C,

Caesar paid 12 dollars to park for 1 day in the airport parking lot,

This is unit price because price for parking is given for one day.

In option D,

Deanna paid 70 dollars to park for 7 days in a city parking lot.

This can not be unit price because price is not given for one day.

The answer would be C, since that gives us the price for one unit (aka, 1 day).