I believe it's copper and gold :)
<span>The 19th century was a period of great change and rapid industrialization. The iron and steel industry spawned new construction materials, the railroads connected the country and the discovery of oil provided a new source of fuel. The discovery of the Spindletop geyser in 1901 drove huge growth in the oil industry. Within a year, more than 1,500 oil companies had been chartered, and oil became the dominant fuel of the 20th century and an integral part of the American economy.</span>
I’m 80% sure it’s A I am sorry if I’m wrong but I don’t think I am
A government could use social media to promote citizen participation by using something like Facebook to encourage them. <span />
