The correct answer is C!
Germany was focusing all their forces in another area, therefore, the AEF were able offensively counter the German forces and help the Allies.
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Seems like it is KDKA and it was a great success
It is debated. He announced the Emancipation Proclamation on his own to weaken the Southern States, but later on needed approval for the passing of the 13th amendment
Fossil fuels are fuels produced by natural processes by anaerobic decomposition of buried dead organisms.
Coal, oil, and natural gas constitute the three major states of fossil fuels. All these have been formed from organic remain of prehistoric plants and animals, under high pressure, high temperature conditions. All three forms are excellent energy sources, upon which modern day civilization is based. Coal is used as a domestic as well as industrial fuel in all three forms: anthracite, bituminous, and lignite. Fractional liquid petroleum is used as automobile and industrial fuel, in all of its variations, viz. gasoline, kerosene, diesel, light oil, heavy oil, green oil, etc. Natural gas is mainly methane, and is a component of domestic and industrial gas supply lines, for use as an easily accessible fuel.