Answer:Muckrakers were a group of writers, including the likes of Upton Sinclair, Lincoln Steffens, and Ida Tarbell, during the Progressive era who tried to expose the problems that existed in American society as a result of the rise of big business, urbanization, and immigration.
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Answer: D she is believed to have been the first female mathematician
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According to parents’ responses in a research study, discussing matters of importance becomes one of the most important ways of behaving towards elderly parents. 
We should give our elderly parents extra time, limit visual and auditory distractions, sit face-to-face with them, never undervalue the power of eye contact, try to listen without interrupting them, and speak slowly, clearly, and loudly while using short, simple words and sentences in order to better understand them.
One should maintain their composure and speak in a kind, straightforward manner when speaking with elderly people. If necessary, speak louder, but don't yell. One should keep sentences brief and straightforward, and concentrate on one point at a time.
Learn more about elderly parents here
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The unit for resistance is Ohm. When subjected to a potential difference of one volt, the SI unit of electrical resistance transmits a current of one ampere.
 
<h3>What is resistance?</h3>
 
It is an electrical circuit, that use to measure the resistance to current flow. The Greek letter omega is used to represent resistance in ohms. Georg Simon Ohm (1784-1854), a German physicist who researched the link between voltage, current, and resistance, is the name given to Ohms.
 
Thus, option C is correct.
For further detail about resistance refer to this link:
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