Propinquity means the state of being close to someone or something; proximity.
Ex: he kept his distance as though afraid propinquity might lead him into temptation
Habit means a settled or regular tendency or practice, especially one that is hard to give up.
Ex: he has an annoying habit of interrupting me
Nearness means the condition of being near; proximity.
Ex: the town's nearness to London
Capacity means the maximum amount that something can contain.
Ex: the capacity of the freezer is 1.1 cubic feet
Tendency means an inclination towards a particular characteristic or type of behaviour.
Ex: for students, there is a tendency to socialize in the evenings
Thus option (B) is the correct choice.