Which aircraft has the right-of-way over the other aircraft listed?
A.	Glider.
B.	Aircraft refueling other aircraft.
C.	Airship.

Answer (C) is incorrect.
An airship has the right-of-way over an airplane or rotorcraft but not a glider.

Answer (A) is correct. (14 CFR 91.113) ( ? )
If aircraft of different categories are converging, the right-of-way depends upon who has the least maneuverability. A glider has right-of-way over an airship, airplane, or rotorcraft.

91.113  RIGHT-OF-WAY RULES: EXCEPT WATER OPERATIONS
Aircraft in distress have the right-of-way over all other aircraft.
When two aircraft are approaching head on or nearly so, the pilot of each aircraft should turn to his or her right, regardless of category.
When two aircraft of different categories are converging, the right-of-way depends upon who has the least maneuverability. Thus, the right-of-way belongs to
Balloons over
Gliders over
Airships over
Airplanes or rotorcraft
When aircraft of the same category are converging at approximately the same altitude, except head on or nearly so, the aircraft to the other’s right has the right-of-way.
If an airplane of the same category as yours is approaching from your right side, it has the right-of-way.
When two or more aircraft are approaching an airport for the purpose of landing, the aircraft at the lower altitude has the right-of-way.
This rule shall not be abused by cutting in front of or overtaking another aircraft.
An aircraft towing or refueling another aircraft has the right-of-way over all engine-driven aircraft.