The correct answer is D. yielding.
A compliant person is someone who is willing to do what they are told or asked to do. They are not easily angered or upset, and they are usually easy to get along with.
A livid person is someone who is very angry. They are often red in the face and shaking with rage.
A complaining person is someone who is always finding fault with things. They are never satisfied with anything, and they are always whining and moaning.
An adamant person is someone who is very stubborn and refuses to change their mind. They are often set in their ways, and they are not easily persuaded.
In the context of the question, the person is known for their compliant nature. This means that they are willing to do what they are told or asked to do. They are not easily angered or upset, and they are usually easy to get along with. This is in contrast to the other options, which describe people who are angry, complaining, or stubborn.