Given here are four sentences. The first sentence is in the correct order, while the rest of the sentences are jumbled. Pick the option that gives the correct order.

A. Halloween’s origins can be traced back to the ancient Celtic festival known as Samhain, 

B. which was held on November 1 in contemporary calendars. It was believed that on that day, the souls of the dead returned to their homes, 

C. In this way, popular Halloween tropes such as witches, ghosts, and goblins became associated with the holiday.

D. so people dressed in costumes and lit bonfires to ward off spirits.