D. Germany's invasion of Belgium.
Answer:
Because of their fighting methods, and high operation skills.
Explanation:
George W. Bush was elected in to office in 2004
<em><u>Lack of sanitation,</u></em><em> </em><em><u>ineffective treatments</u></em>, and <em><u>increase of rats and fleas</u></em> are the contributors. The other three are the effects.
