A new coffeehouse downtown would like to run an “afternoon espresso” promotion to increase sales during the afternoon hours on weekdays. Which AdWords feature is most effective for preventing their search ads from appearing at night or on weekends?

A new coffeehouse downtown would like to run an “afternoon espresso” promotion to increase sales during the afternoon hours on weekdays. Which AdWords feature is most effective for preventing their search ads from appearing at night or on weekends? 

A) Position Preference
B) Automatic Bidding
C) Ad Scheduling 
D) Keyword Planner