Read again. Which type of art (A-C) ... 1 can't be seen in the usual way? 2 requires special control of the body? 3 attracted the interest of the media? 4 was made by a very young artist? 5 had well-known owners? 6 was inspired by a childhood experience? 7 is over 50 years old? 8 has a lot of opponents? 9 was done by an artist that was well-known by the public? 10 is done by an artist who doesn't want people to know his/her identity?