Which sentence does not contain any errors in the use of italics or quotation marks?
a. is that cursive letter in the note a u or a v?
b. is that cursive letter in the note a "u" or a "v"?
c. is that cursive letter in the note a u or a "v"?
d. is that cursive letter in the note a u or a v?

Aman lives on the twelfth floor of an apartment building. every morning he takes the elevator down to the lobby and leaves the building. in the evening, he gets into the elevator, and, if there is someone else in the elevator -- or if it was raining that day -- he goes back to his floor directly. otherwise, he goes to the tenth floor and walks up two flights of stairs to his apartment.