Can someone help me i forgot what a idiom was (btw this is language arts)

Which of the following correctly describes a repurchase agreement? the sale of a security with a commitment to repurchase the same security at a specified future date and a designated price. the sale of a security with a commitment to repurchase the same security at a future date left unspecified, at a designated price. the purchase of a security with a commitment to purchase more of the same security at a specified future date.