QUERULOUS:

Disconnected
Timorous
Disputed
Contented

The correct answer is: A. Disconnected

Querulous means complaining or whining. It is an adjective that describes someone who is always complaining or finding fault.

The other options are:

A querulous person is not likely to be any of these things. They are more likely to be unhappy and dissatisfied, and to complain about everything.