<span>Railroad, steel mill, oil and other industrial businessmen were called robber barons. The connotation was often used during the American Great Depression in the 1930's. It was alleged the owners such as Cornelius Vanderbilt, Carnegie Mellon and John D. Rockefeller amassed their fortunes using unethical and exploitative practices to build their financial empires. This included not just unfair and harsh treatment of workers but also accusations of swindling and bribery of officials to accomplish monopolies, licensing, zoning, and other favorable treatment to build and expand the businesses.</span>
<span>True. With rioting happening in Berlin in 1848 and rioters demanding a constitution, it became clear that the only way to avoid further destruction and calamity was for the Prussian king Frederick William IV to promise a constitution. He upheld his end of the bargain to end the riots.</span>
Which renewable source of energy faces the threat of gradually becoming scarce in various regions of Earth?
A. Water
B. Tides
C. Wind
<u>D. Sunlight</u>
