Concept:"Net 3 months" means the entire invoice amount is due three months from the invoice date.Explanation:The word "net" means the full amount is payable, with no discount allowed.The period "3 months" is the credit time given to the buyer.Thus, the buyer must settle the complete invoice amount three months after the invoice is issued.No interest or discount is involved in this term.Answer:C. pay full invoice amount after 3 months