The two sides have finally though some small differences still exist.A. made a decisionB.

问题补充：

The two sides have finally, though some small differences still exist.

A. made a decision

B. reached an agreement

C. settled down

D. broken up

答案：

A. made a decision

(答案→)B. reached an agreement

C. settled down

D. broken up

解析：A项意为“做出决定”，B项为“达成一项协议”，C项为“定居”，D项为“破译”，故根据题干中“two sides have finally”需填入“达成协议”。