Which of the Following Is an Example of Inbound Communication

Which of the following is an example of inbound communication with a customer seeking new hiking boots? (Timberland is a brand of hiking boots)

A) A searches for and then visits the website of a Timberland to read about boots.
B) The customer receives a mailing that features Timberland boots from a local shoe store.
C) Timberland runs television ads on its new boots.
D) The customer reads Timberland's CEO Twitter messages.
E) The customer goes into a store selling Timberland boots.