Steam turbine driven propulsion machinery depending on forced lubrication must, under 46 CFR, be arranged to do which of the following upon failure of the lubricating system?

Why A is correct

46 CFR §56.50-80(g) requires that steam turbine driven propulsion and auxiliary generating machinery depending on forced lubrication be arranged to shut down automatically upon failure of the lubricating system. The emergency oil supply requirement in paragraph (i) applies to steam driven propulsion machinery to sustain lubrication during that automatic shutdown coast-down, but the primary requirement triggered by failure is automatic shutdown.