1. What event sets the main action of the story in motion? A Judson forgetting his boots B Marcia's departure for Alec's house C the theft of some of Judson's liquor D the end of the summer vacation season

The event that sets the main action of the story in motion is the theft of some of Judson's liquor.

Explanation:

The events in Ruthless By William DeMille are triggered as Judson Webb decided to turn his bottle of wine into a poisonous tramp for a thief, as he felt deeply offended for the secret robbery las winter, he sets the events to get his revenge without knowing that the destiny and resolution were going to go in a different direction.