The use of labor-saving devices in industry and agriculture. So b is the correct answer
Answer:
The Inca fell by a combination of civil war and the Spanish invasion.
Explanation:
Before the explosion of the USS Maine, American was opinion divided.
On the night of 15 February 1898, Maine sank while her ahead gunpowder magazines exploded. Almost three-quarters of the battleship's crew died as a result of the explosion.
In 1976, a team of yank naval investigators concluded that the Maine explosion turned into in all likelihood resulting from a hearth that ignited its ammunition stocks, not by way of a Spanish mine or act of sabotage.
Maine was an American army deliver that sank in Havana Harbor on February 15, 1898, contributing to the outbreak of the Spanish–American struggle in April. American newspapers, undertaking yellow journalism to enhance flow, claimed that the Spanish were liable for the ship's destruction.
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