A、A tool of becoming icons of the digital era. B、A tool of artistic expression to which we all have access. C、A shift in society

The next time you snap a selfie with your friends on holiday or a night out, you might just be creating the next artistic masterpiece.
    (16) London’s Saatchi Gallery is planning a new exhibition to explore the importance of selfies as an art form. It will feature not only self-portraits by the likes of Vincent Van Gogh, but also more recent celebrity selfies. Members of the public will also be invited to submit their own photos for the exhibition.
    The popularity of the selfie has rocketed since the invention of smartphones and in 2013 Oxford Dictionaries named "selfie" as their word of the year.
    The Saatchi Gallery said the exhibition will showcase a selection of well-known pieces as well as "selfies that have quickly become icons of the digital era."
    More modern examples in the exhibition will include a selfie taken by Kim Kardashian and another of former US President Barack Obama with former Prime Minister David Cameron.
    (17) Nigel Hurst, chief executive officer at the Saatchi Gallery, described the smartphone selfie as an example of a shift in society using technology as a means of self-expression.
    The gallery will also include the launch of the Selfie competition, asking people around the world to post then-most interesting selfies on social media for a chance to be featured in the exhibition.
    Glory Zhang of Huawei, which is partnering with the Saatchi Gallery for the exhibition, said: "The smartphone has become a tool of artistic expression. (18) The selfie generation is becoming the self-expression generation as each of us seeks to explore and share our inner creativity through the one artistic tool to which we all have access: the smartphone."
Questions 16 to 18 are based on the passage you have just heard.
16. What is London’s Saatchi Gallery planning?
17. How did Nigel Hurst describe the smartphone selfie?
18. What facilitates the exploration and share of our inner creativity?