Von Steuben turned the ragged Continental Army into a more effective fighting force by drilling and teaching the army discipline
There are 5 layers. The Lithosphere, the Asthenosphere, the outer core, the inner core and the mantel.
I think it is the more fertile the soil
since, a,b is an acid.. imposibble it is the answer
we left with c and d
while we can see that 'hyroxide' is a base
answer: C