Final answer:
The Einstein Podolski-Rosen argument, also known as the EPR argument, challenges the completeness of quantum mechanics by suggesting the existence of hidden variables.
Step-by-step explanation:
The Einstein Podolski-Rosen argument, also known as the EPR argument, is a thought experiment in quantum mechanics. It was proposed by Albert Einstein, Boris Podolsky, and Nathan Rosen in 1935. The argument is designed to challenge the completeness of quantum mechanics, suggesting that it might be missing hidden variables that would provide a more complete description of physical reality.
The correct answer to your question is a) It supports the existence of hidden variables in quantum mechanics. The EPR argument does not disprove the uncertainty principle, suggest time travel is possible, or advocate for the many-worlds interpretation.