Today, we use the Gregorian<span> calendar so I believe it's A. </span><span>the 12 month calendar</span>
George B. McClellan.
Naturally Lincoln won.
The development of agriculture occur circa around 8000-6000 years ago. It was a time where many nomadc population begin to settle in a place, thus effectively starting the civilization as we know now. it was a huge shift for humanity and it was probably one of the most important, if not <em>the</em> most important achievement in human history.
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It was quickly accepted as the preferred food source by people living in settlements because it could be planned and organized, thus helping people reaching a balance easily and preventing them from being dependent from the results of hunt and gathering. it was a safe and sicure way to assure food for everyone.
D. because none of them explain the true meaning of what you want
