The answer is I. 25 meters.
Oldest to youngest- D, A, E, B, C
It's called relative dating, you basically find the rocks that are at the very bottom (oldest), look for the ones that are on the top (younger), but if you find any that are cross cutting, those are the youngest of them all.
The Contiguous United States does not include Alaska, Hawaii, or any other territories under the control of the United States. Alaska is unique among the US states as it is part of the North American continent, meaning it is attached via Canada, and so is part of the "Continental United States".
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Relation between buoyancy, isostatic equilibrium, and epeirogenic processes</u></h2>
Buoyant force or buoyancy, is the force exerted in an object which is fully or partially occupied in a fluid. Isostatic equilibrium is the gravitational equilibrium between earth's crust and underlying mantle. while epeirogenic process is the depression of land having long wavelengths.
Both epeirogenic process and isostatic equilibrium uses the principle of buoyancy. The crust of the Earth or the lithosphere floats over underlying mantle at an elevation depending upon its density and thickness.