IT would be E All of the options are correct.
Answer:
darkened outlines of people.
Answer:
Option D. is the right answer
Explanation:
John C Fremont, is an American explorer who had undertaken many expeditions, in which the second expedition describes his Oregon Trail.
He crossed the Sierra Nevada mountain range and entered California. He passed through Nebraska, Wyoming. Fur trade was a famous trade in Wyoming.
He traveled through a rugged terrain which was totally empty and uninteresting to look at. He reached Great Salt Lake where he collected plants and rock specimen. It was a 14 month mission which earned him the title ‘Pathfinder’.
<u>The vacuum cleaner</u>
The firsts official vacuum cleaners were actually invented in England in 1901 by Hubert Cecil Booth. Though a great invention, his models were too big and not practical at all: they couldn't even enter buildings so it was used as a cleaning service or installed in the building itself.
After him, several other men made different versions of the vacuum cleaner: smaller, practical, portable, more efficient, with more accessories, etc. Until the American William Henry Hoover in early 1900s redesigned the vacuum cleaner: placed it in a steel box, designed attachments for the hose, added disposal filter bags and finally designed the first upright vacuum cleaner in 1926.
It wasn't until post-WW II, that the item could be afforded by American middle class and became common in households. Before it was a luxury. Later on, the appliance was widespread to the Western countries. Several variants of the vacuum have been made too.