The correct answer is join.
B. square off
C. taper to a point
The correct answer is (D) To join by interlocking web-shaped joints that resemble the shape of a dove's tail. To join together compactly or harmoniously; to fit together well by means of a dovetail; to cause to fit well together.
Dovetail comes from the joint of that name.
Examples of use:
- The two pieces of wood dovetailed together.
- His story dovetails with your account of the facts.