HELP PLS QUICK 40 PONTS
Which sentence is punctuated correctly?

A) At the end of a long day: there is usually just one thing on my mind sleep.
B) I relaxed in my chair and closed my eyes I was finally: home.
C) I have a number of hobbies: reading, swimming, and traveling to different state parks each summer.
D) She broke her record running time by clocking a five minute:twenty second mile.