The correct answer is stalemate.
B. narrow passage
D. difficult transition
The correct answer is (D) A stalemate; deadlock. Also, a blind alley; a dead end; a path or road from which there is no way out; position from which there is no escape.
Impasse comes from French (im + passer [pass]).
Examples of use:
- The negotiating teams reached an impasse that they could not bridge.
- Ten kilometers farther, the road ended in an impasse.