All of the following added to the clarity of the content in kennedy’s inaugural address except a) straightforward and simple word choice. b) the use of pathos. c) repetition of important ideas. d) directly addressing the audience with the use of “you”

President John F. Kennedy's inaugural address in January 1961 was described for having a strong and emotional attack to his points. It did not only used pathos but also appeals to ethos and logos. He used "you" in the line “Ask not what your country can do for you but ask what you can do for your country." Among the choices, the inauguration address did not use repetition of important ideas. Answer here is C. 

the answer to your question is the use of pathos

The Northwest Ordinance of 1787 appeared to outlaw slavery, which meant that slavery was not allowed in the Northwest Territory. However, the passage of the Fugitive Slave Laws meant that slaves who escaped from one state to another one would have to be returned to their owners, even if found in a free state. Therefore, escaped enslaved people in the Northwest Territory were not necessarily considered to be free.