Julie visited a craft store where all items were 25% off. She wants to program her calculator so she can input the marked price and the discounted price will be output. What is the expression for the discounted price on a marked price of p dollars?
A. P-0.25p
B 0.25p+p
C 0.25p+0.75p
D 0.25p
E 0.25p-p