It Costs $\$ 15$ To Operate a Lemonade Stand, While a Cup of Lemonade

Multiple Choice

It costs $\$ 15$ to operate a lemonade stand, while a cup of lemonade sells for $\$ 0.75$ .
Which of the following expresses the profit, $P$ , as a function of the number of cups, $c$ , of lemonade sold.

A) $P=0.75 c-15$
B) $P=0.75 c+15$
C) $P=15.75 c$
D) $P=0.75 c$