An artisan makes decorative pillows to sell at a craft convention.

The artisan makes a batch of pillows on Monday and makes x more pillows on Tuesday to sell at the convention.
The expression 6(12+x) represents the total amount of time, in hours, the artisan spends making pillows on Monday and Tuesday.
Which statement about (12+x) is true?

A. The expression (12+x) is a factor that represents the total number of pillows the artisan makes on Monday and Tuesday.

B. The expression (12+x) is a factor that represents the total number of hours the artisan spends making pillows on Monday and Tuesday.

C. The expression (12+x) is a constant that represents the total number of pillows the artisan makes on Monday and Tuesday.

D. The expression (12+x) is a constant that represents the total number of hours the artisan spends making pillows on Monday and Tuesday.