The answer would be a.The lords needed to protect their land from other nobles. Hope this helps:)
Henry Ford is known as the godfather of the American car industry, even though Carl Benz invented the first vehicle in 1879.
Today, over 4.25 million people work directly within the automotive industry. Not only has car manufacturing become one of the largest industries in the world, it’s also been the driving force behind the growth in the oil and gas industry.
The Underground Railroad was in the times of a national slave trade. This is where slaves were captured, but those who were free or running away typically at night would hide out in houses up in north Canada Harriet Tubman lead them… I hope this helps
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Image result for What was the "Three Field System" and how did it revolutionize European agriculture?
The three-field system let farmers plant more crops and therefore increase production. ... Crop assignments were rotated every year, so each field segment would be planted for two out of every three years. Previously a "two field system" had been in place, with half the land being left fallow.
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