Select the statement that best aligns with the themes presented in Parmenides' metaphysics.

• a.)
• The true nature of reality is discovered through the senses.
• b.)
• The universe is constantly changing and has never been the same from one second to the next.
• c.)
• The world of reality and the world of appearances contradict one another.
• d.)
• The essence of right and wrong can be determined through observation of the natural world.