The Expression "3 / 10,n / 30" Means

The expression "3 / 10,n / 30" means

A) a 10 percent discount if paid in full within 3 days,or the net amount is due in 30 days.
B) a 3 percent discount if paid in full within 10 days,or the net amount is due in 30 days.
C) a 3 percent discount if paid in full within 3 days,or the net amount is due in 10 days.
D) a 3 percent discount if paid in full within 30 days,or the net amount is due in 10 days.
E) no discount is available on this order; the net amount is due between 10 and 30 days.