What power sources did humans use before and during McCoy's era?

People used animal power, mules, oxen, and horses.
People used wind power, used to pump water from wells.
People used water powered mills used to grind grains and cut lumber.
all of the above

What’s the importance of gaining a general understanding of and interpretation of the work of literature.

The institute of international research is holding its annual convention. this year more than 500 scholars have been invited to hear research reports on many timely topics. approximately 250 big name scientists will be winging their way to washington, d. c. how can the underlined sentence be revised so that it fits the tone of the passage? a) approximately 250 people will be in washington, d. c. b) approximately 250 bigwigs will be flying to washington, d. c. c) approximately 250 science people will be going to washington, d. c. d) approximately 250 well-known scientists will be arriving in washington, d. c.

Me? which of the following describes theodore roosevelt’s ideas about the role of the government? a) to keep the powerful from taking advantage of small business owners b) to all citizens get rich and to take care of the lazy c) to break all company trusts because all big businesses wanted to bully the smaller ones d) to close off all wild lands and leave them untouched