The correct answer is A. Seniority.
Superiority is the state or quality of being superior. It can be defined as being higher in rank, position, or importance. Seniority is the state or quality of being senior. It can be defined as being older or having longer service than someone else.
B. Juniority is the state or quality of being junior. It can be defined as being younger or having shorter service than someone else.
C. Inferiority is the state or quality of being inferior. It can be defined as being lower in rank, position, or importance.
D. Urbanity is the quality of being urbane. It can be defined as being sophisticated, refined, and polite.
E. Posteriority is the state or quality of being posterior. It can be defined as being later in time or order.
In conclusion, the correct answer is A. Seniority.