The correct answer is A. If in the first box of the diagram the employee is giving an unfavorable opinion about his boss in a newspaper, and in the last box there is a judge ruling a sentence, the second box has to refer to a judicial issue. As the boss is the only one injured by the employee's declaration, he is the only one who can access justice regarding this issue, so the options are limited to A and C. The correct answer ends up being A, since when arguing libel, the boss can access justice by suing his employee, not if he defended him by saying that his statement was a symbolic speech.
The Enforcement Act of 1870 basically made illegal the voting discrimination that existed on the basis of race. It made illegal the opposition of some government officials to integrate former slaves, mainly African-American in the social and political life.
D. That Romeo has committed a sin by sleeping with Rosaline
I think he meant that to be successful is to try without which implies that every time you wake up you do not think or wish about being successful it just happens without any second thought.