Which scenario is an example of a webchat bot?

Which scenario is an example of a webchat bot?

A. Determine whether reviews entered on a website for a concert are positive or negative, and then add a thumbs up or thumbs down emoji to the reviews. B. Translate into English questions entered by customers at a kiosk so that the appropriate person can call the customers back. C. Accept questions through email, and then route the email messages to the correct person based on the content of the message. D. From a website interface, answer common questions about scheduled events and ticket purchases for a music festival.