The credit terms 2/10, n/30 are interpreted as: 
A、2% cash discount if the amount is paid within 10 days, or the balance due in 30 days.
B、10% cash discount if the amount is paid within 2 days, or the balance due in 30 days.
C、30% discount if paid within 2 days.
D、30% discount if paid within 10 days.
E、2% discount if paid within 30 days.