The answer is A. They do this as a way of showing party unity.
The human activity most widely viewed as changing the planet is the burning of fossil fuels. ... to melt, threatening water supplies for hundreds of millions of people. ... and phosphorus to the biosphere than would occur naturally. ... compounds that can remain active in the environment for thousands of years .
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The raising of the real wage of England (due to the shortage of labour as a result of the reduction in population), a trait shared across Western Europe, which in general led to a real wage in 1450 that was unmatched in most countries until the 19th or 20th century.
The battle stopped the Germans from advancing further east.