With call extensions, a customer who searches for Thai food on her mobile phone can see an ad for a Thai restaurant, along with a phone number, and make the call with one click. How is that priced?

  •  The same as when someone clicks on an ad
  •  Negotiated in advance, with bulk discounts
  •  Flat fee, based on the caller’s phone model
  •  By the minute, based on the length of the call

The correct answer is:

  • The same as when someone clicks on an ad.