<em>Occurred after the Revolutionary War </em>This is the correct option.
The Early American Literary Period took place <em>before</em> the European colonizers arrived in the U.S. This period was from 1607 to the late 1700. The Revolutionary war took place towards the end of that period: between 1765 and 1783.
<em>No improvement or correction is required </em>This is the correct option.
Property values are rising in our area, (which <u>makes</u> <u>us</u> feel wise for buying our home years ago.) The underlined words are key words: <em>makes </em>is the main verb in the clause and refers to a general feeling ; it expresses a cause at the moment of the message: the present time. <em>Us </em>coordinates with <em>our</em> <em> </em>so the objective pronoun should indicate first person pronoun.
For this type of essay, you would want to emphasize that the main cause of Ebenezer Scrooge's attitude towards life comes from him seeing his past and present.