I could be wrong, but I am pretty sure that the answer is: D, pollution.
There were 7,719 more Staph infections in 2007 than in 1997. In 2007, there was widespread of Staph infection as the bacteria spread quite rapidly in schools, prisons, and other public facilities. Which a reason why you found more cases of Staph infection in 2007 than you did in 1997.
Germany and Austria-Hungary were both affected negatively. Germany had to get tod of their air force and cut their armies down to just 100,000 men, and both Germany and Austria-Hungary, already in debt, had to pay America for the war with money that they didn't have.
Hope this helps!
<span>The
United States purchased the Spanish-colonized-countries such as Philippine
Archipelago, Cuba, Puerto Rico, Guam and some parts in North America under the
Treaty of Paris on December 10, 1898 and came into full effect on April 9, 1899
after the ratification. This became the indicator that the Spanish-American War
has ended. The Spain sold the Philppine archipelago for $20,000,000 after
colonizing it for 333 years. Simply, through the Treaty of Paris, the United States
got all the remaining countries colonized by the Spanish empire.</span>
