How did charles william siemens influence the second industrial revolution? a. his system of hiring only skilled workers led to greater production. b. his skyscrapers changed building methods throughout europe. c. his use of petroleum to power machines led to changes in many industries. d. his method for producing steel in large quantities allowed it to be used on a massive scale.

D. His method for producing steel in large quantities allowed it to be used on a massive scale.

Explanation:

Sir Charles William Siemens built up his regenerative furnace  during the 1850s, for which he asserted in 1857 to ready to recuperate enough warmth to spare 70–80% of the fuel. The furnace worked at a high temperature by utilizing regenerative preheating of fuel and air for combustion. Through this strategy, an open-hearth furnace can achieve temperatures sufficiently high to melt steel.

answer: an oligarchy is a political system in which the government is run by a group of noble families, or the elite wealthy members of a society. a present day oligarchic government is iran.

explanation:

it granted civil rights to african americans.