The artist known for his monumental work 'Spiral jetty' (a spiral of basalt rock and salt crystals):
ARichard Serra
BRichard Long
CDavid Smith
DRobert Smithson
Answer:
D. Robert Smithson
Read Explanation:
Spiral Jetty is an earthwork sculpture constructed in April 1970 that is considered to be the most important work of American sculptor Robert Smithson. Smithson documented the construction of the sculpture in a 32-minute color film also titled Spiral Jetty.