According to the NITI Aayog's National Multidimensional Poverty Index (MPI) 2023, which specific indicator under the 'Standard of Living' dimension registered the most significant improvement (largest percentage point reduction in deprivation) in Bihar between 2015-16 and 2019-21?

Options:

• A: Electricity
• B: Sanitation
• C: Cooking Fuel
• D: Housing

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