Which statement is true regarding Parmenides' theory of the universe?

Parmenides' theory of the universe is fundamentally a metaphysical theory. He is known for his argument that change and multiplicity are illusory and that only the concept of 'being' is real. Parmenides posited that knowledge should be derived from reason rather than sensory experience, asserting that the sensory world is deceptive. His philosophical views delve into the nature of reality and existence, which positions his work firmly within metaphysical discussions.

In contrast, the other options do not accurately describe Parmenides' approach. An empirical theory would rely on observation and experience, which contradicts Parmenides' emphasis on unchanging reality. Additionally, he dismissed sensory experiences as misleading, thus steering away from any theory that depends on them. Finally, categorizing his theory as scientific does not align with the principles of science that depend on empirical evidence and the possibility of falsification, which are not foundational to Parmenides' philosophical assertions.