<Li> for Guitar (1958), guitar; </Li> <Li> Trio for Strings (1958), violin, viola, cello; </Li> <Li> Study (c. 1958--59), violin, viola (unfinished); </Li> <Li> Sarabande (1959), keyboard, brass octet, string quartet, orchestra, others; </Li>

Which of the following is a contemporary american musical composer known for minimalist music