i think its either c or a but im not entirely sure but i hope this helps you a little more then nothing.
<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>
The Three Principles of the People is a concept of Sun Yat-sen, which was influential in China (this is the correct answer) . The three principles are nationalism, democracy and the livelihood of the people (well-being.)
Today, they can be found in the national anthem of the Republic of China (Taiwan).
