The correct answer is D. Cynic.
A cynic is someone who believes that people are motivated by self-interest and that human sincerity and goodness are rare or nonexistent. They are often skeptical of authority and conventional wisdom, and they may be critical of society and its institutions.
An egoist is someone who believes that their own interests are the most important thing. They may be selfish and unconcerned with the needs of others.
A fatalist is someone who believes that everything that happens is predetermined and that there is nothing that can be done to change it. They may be pessimistic and resigned to their fate.
A stoic is someone who accepts the world as it is and tries to live a life of virtue and indifference to pleasure and pain. They may be calm and unemotional in the face of adversity.
In conclusion, a cynic is someone who has little faith in human sincerity and goodness.