The correct answer is: Option C. How do the Constitution and the Declaration of Independence differ from the Emancipation Proclamation?
In this research question, two elements are to be compared with the characteristic of another. Once compared, the analyzer would be able to spot the differences between both of these groups, therefore, finding contrast among them. The key element that fits this question in the execution of the comparison and contrast method is the verb "differ", which separates one group of elements from the other.
