Who was the ground-breaker in post modern dance that believed that people should find their own way of moving and be equal in the group with no social hierarchies?

it is Isadora Duncan

i believe the answer is: a.  abstract forms were often used to represent human figures.

representing human figures in abstract forms is often used in the geometric period, not hellenistic  period.   during the hellenistic  period,   aesthetic value derived from creating arts which mimic the actual shape of a certain object or individuals.

hope this ! < 3