The best way to measure public opinion is through opinion polls - B
With opinion polls you get an idea what is the general idea about a certain topic from the public, as you usually get a high enough sample to deduce the relevant information.
To answer your second question I would say it is either B or C as being a sole proprietor usually makes you subjec to being a small business or you're forced to use factors of production less efficiently.
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We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of
Happiness.
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The British Empire's Proclamation of 1763 prohibited white settlers from crossing over the Appalachian mountains into territory reserved for Native Americans. White settlers responded by
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I hope this helps :)
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he reconstructed the city politics and sterngthened the senate power