"<span>It led to a large number of causalities on both sides" would be the best option from the list, since the war still dragged on although now with far more men involved, meaning more deaths.</span>
The answer is two and a half years.
The United States watched World War I from afar for two and a half years before entering and declaring a war against Germany on April 6, 1917. Before entering the war, United States was intent on keeping a neutral relationship between countries that are involved in the war.
Oklahoma is the nation's<span> third-</span>largest producer of<span> natural gas, fifth-</span>largest producer of<span> crude oil, and has the second-greatest number of active drilling</span>
