The correct answer is A. Unrestrained.
Incontinent means unable to control one’s bowel or bladder movements. It can also mean lacking in self-control or restraint.
Unrestrained means not controlled or limited. It can also mean free from restraint or control.
Restless means unable to keep still or quiet. It can also mean feeling or showing a lack of peace or quiet.
Inconstant means not staying the same for long. It can also mean changing frequently or suddenly.
Uncertain means not sure or definite. It can also mean not having or showing confidence.
In this case, the word “incontinent” is most closely related to the word “unrestrained.” Both words mean not being able to control oneself. In the case of incontinent, this means not being able to control one’s bowel or bladder movements. In the case of unrestrained, this means not being able to control one’s behavior.
The other words are not as closely related to “incontinent.” Restless means unable to keep still or quiet, which is not the same as not being able to control oneself. Inconstant means not staying the same for long, which is not the same as not being able to control oneself. Uncertain means not sure or definite, which is not the same as not being able to control oneself.