Answer:
I think it's C, don't quote me tho.
The correct answer is the first option.
The Great Depression was maybe the most devastating economical periods in the 20th century for the United States. After the stock market crash of 1920 the effects were widely felt. The people blamed the United States government for the crisis and they expected them to interfere and fix it. <span />
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An abolitionist is the person who would be most likely to help an enslaved person escape.
Abolitionists wanted to end slavery, so obviously they would do anything in their power to aid those slaves in need. Overseers are supervisors, smugglers smuggle illegal goods, and traders are just merchants.
Opinion polls are made picking a portion of a population and asking them some questions about a given subject. These answers are, then, used to make an idea of what that population thinks about that subject.
The problem is the impossibility of asking the entire population what they think about the subject.
For example, 80% of the persons the poll interviewed agreed that studying is good as early as five years old. The opinion poll, then, will say 80% of the people from that location agreed to that studying starting from five years old is good. The persons asked totalize 5000, while the total population of that place is, for example, 100.000.
So, the statement that defines opinion pools is: opinion pools can give an idea of what a population thinks, but it might be misleading and can never be accurate enough.