The answer is b. His work became the basis for algebra.
Travelling was difficult due to flooding...communication i’m not so sure.
<span>On April 2, 1917, President Woodrow Wilson asked Congress to declare war against Germany, saying, “The world must be made safe for democracy.” Four days later, Congress voted overwhelmingly in favor of a war declaration.</span>
In the given time frame from 1700 to 1790 the population of England and Wales did not decreased at all, on contrary, the population in England and Wales actually was rising steadily, and by the end of this period there was a fast increase in the population, similar to the ''baby boom'' period few centuries afterwards.
