Final answer:
The correct answer is C) Exploration of human reason and intellect.
Step-by-step explanation:
The correct answer is C) Exploration of human reason and intellect. Greek literature during the classical period emphasized the importance of human reason and intellect. This can be seen in the works of philosophers such as Socrates, Plato, and Aristotle who delved into questions about knowledge, ethics, and the nature of reality. Greek literature also included the exploration of human emotions and the complexities of human relationships, as seen in plays like Sophocles' 'Oedipus Rex' and Euripides' 'Medea'.