15. If an organization purchases $700 of supplies on account, with terms of 2/15, n50: A. $650 must be paid within 15 days of the invoice date. B. $698 must be paid within 50 days of the invoice date. C. $686 can be paid within 15 days of the invoice date, or $700 must be paid within 50 days of the invoice date. D. $686 can be paid within 15 days of the invoice date, or $714 must be paid within 50 days of the invoice date.