Leslie's Makes a Sale to Kate Today with Credit Terms

Leslie's makes a sale to Kate today with credit terms of 1/5, net 15. This means that:

A) Leslie's is offering a 5 day discount period and an additional 15 day credit period.
B) Kate will be delinquent 6 days from now if she indicated that she was going to pay within the discount period.
C) Kate can take a 1 percent discount if she pays within 5 days or she must pay the entire amount 20 days from today.
D) Kate will pay a 1 percent fee for every 5 days that pass after the 15 day credit period.
E) Leslie's is willing to reduce the price by 1 percent in order to collect 10 days sooner.