Question: What is a justification for having polynomial time approximation schemes ( PTAS ) for NP - Hard problems? PTASs settle the P , NP problem,

What is a justification for having polynomial time approximation schemes (PTAS) for NP-Hard problems?
PTASs settle the P, NP problem, it is true that P=NP.
Exact algorithms that compute the optimal solutions to NP-Hard problems run in exponential time.
PTASs always give the exact optimal solutions to NP-Hard problems.
PTASs generate solutions to NP-Hard problems that run in exponential time.
What is a justification for having polynomial

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