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.
It led to disagreements between Arab and Jews over control of the Holy Land
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Virginia Plan
Each of the states would be represented in proportion to their “quotas of contribution, or to the number of free inhabitants.” States with a large population would thus have more representatives than smaller states. Large states supported this plan, while smaller states generally opposed it.
The raid took place on October 16, 1859 before the war. Brown was a man determined to abolish slavery, a belief of many northerners. This Revolt was led by an abolitionist, or a person against slavery. The raid indicated that abolitionists would use violence to overthrow slavery. Slavery was a big issue during this time and was a huge reason for the sectionalism between the North and South.