Robert Smithson's Spiral Jetty is an example of:

A. land art.
B. feminist art.
C. Neo-Expressionism.
D. performance art.
E. Neo-Dada art.

A
Also known as Earth art, it was another way in which artists of the later 1960s sought to separate art from issues of money and ownership and to escape from urban exhibition spaces, opening up alternatives to the weighty traditions of painting and sculpture.