A systems administrator needs to append output of ls `"lha /opt command to the contents of a test.txt file. Which of the following commands will accomplish this? 

Answer options:

A. ls "lha /opt > test.txt
B. ls "lha /opt < test.txt
C. ls "lha /opt >> test.txt
D. ls "lha /opt << test.txt

C

Reference: https://www.cyberciti.biz/faq/linux-append-text-to-end-of-file/