Delta Enterprises purchased raw materials worth $$12,000$ from Beta Inc. on terms $2/15,$ n$/45.$ What does $2/15$ stand for?

A$.$ Delta is entitled to a $2\%$ discount if it pays within $15$ days.

B$.$ Delta is expected to pay for the raw materials on February $15.$

C$.$ Delta is entitled to a $15\%$ discount if it pays within two days.

D$.$ Delta may pay in two installments $15$ days apart.

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