Q: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Tough sell? More than two thirds of Americans have said they are not interested in buying Apple's new smart watch Apple's new smartwatch may be a tough sell, with 69 percent of Americans indicating they are not interested in buying the gadget, according to a Reuters/Ipsos poll. However, the survey also showed limited awareness of the watch. The poll was taken after Apple Chief Executive Tim Cook rolled out the product on Monday, and only about half of respondents said they had heard news of the timepiece in the last few days. Also, in an encouraging sign for Apple, roughly 13 percent of survey respondents who did not own an iPhone said that they would consider buying one in order to buy an Apple Watch, which needs an iPhone to work fully.Survey also found half of respondents hadn't heard news of the gadgetReuters/Ipsos poll was taken after the product was rolled out on Monday13% who didn't have an iPhone said they would consider buying the watchIt is the company's first new product in five years 
 Question:from existing _ users, but its wider success is seen.
A:
iPhone