The correct options are
A People are engaged in different kinds of work.
B Certain kinds of work are valued more than others.
C People who clean garbage are seen as impure.
Caste system discriminates against a large number of people. People are engaged in different kinds of work and certain kinds of work are considered more important than others. People who clean garbage, wash clothes and cut hair are considered as impure. The different castes are placed in a hierarchy. Caste system was highly discriminatory and inhuman.