The answer is (D) Grendel grapples with trying to understand the meaning of life because Grendel is capable of human emotions.
Most fundamental human qualities are displayed by Grendel. He was an intelligent monster with the irrational thoughts capability. He shares the lineage with the human being, as being a descendant of the biblical Cain. Very little separates him from other human beings due to his nasty eating habits and awful appearance. Moreover, he accentuates the inherent violence of man. This highlights his philosophical quest is of human-like. By the wasteful war he feels disgusted on the other hand he is easily upset and cautious.
Positive thinking is an attitude that pushes you to expect good and desired results. Power of positivity helps you in creating and transforming energy into reality. Positive mindset helps you to seek happiness, health and a happy ending regardless of the situation. Lots of successful people have recognized the positivity as the key to success.