Does the actual say what do you think because if it does they want your opinion
They are the same equation just reversed
<span>The correct option is A. Dark age are so called because compare to other eras, historian don't know much about this era. This period of time is considered lost to history, no important record about the era has survived, The cause of the dark ages was the collapse of the Roman Empire and the invasions and raiding that characterized it.</span><span />
An "adaptation." It's the natural way that birds of flight adapt to their needs or environment which makes them more efficient.
