What is the significance of the concept of the multiverse in theoretical physics?
a) It offers a potential explanation for the fine-tuning problem of the universe.
b) It suggests the existence of an infinite number of universes with different physical laws.
c) It provides a framework for unifying all fundamental forces within a single theory.
d) It is a well-established theory with strong observational evidence.
e) It helps explain the accelerating expansion of the universe.