4. If the Mark-up of Yellow Corn is 5.00 Php from a Selling Price of 15.00 Php with a Purchase Cost of 10.00 Php, you can say that ___.

A. The Mark-up % is 5.00 Php using mark-up
B. The Mark-up % is 50 % using purchase cost.
C. The Mark-up is 0.50 using mark-up
D. The Mark- up is 0.333… using selling price.

answer this correctly plss
thank you​