Hinduism has a direct effect on the societies that practice it because it:

A. forbids its followers from worshipping more than one god.

B. establishes a social hierarchy based on a strict caste system.

C. teaches that human actions have no significant consequences.

D. orders its followers to aggressively spread their beliefs.

People gnerally say that Hinduism is having a direct/straight effect on the groups or societies who are practicing as it develops a social hierarchy which is based on a strict and non-broken caste system. (B)

Explanation:

Hindu caste system contains 4 castes. They are Brahmins, Vaishyas, Kshatriyas, Shudras. It is believed that Brahmins are originated from the head of Brahma (the creator), Kshatriyas from shoulders, Vaishyas from the lap, Shudras from feet.

Shudras ranks the lowest and Brahmins rank the highest among all castes. This caste system was in place to distribute the works among people to create a functional society.

B. establishes a social hierarchy based on a strict caste system.

Explanation:

The Hinduism social hierarchy is called "Varna". Refers to social classes in Brahminical texts like the Manusmriti.

Brahmins: priests, scholars and teachers.

Kshatriyas: rulers, warriors and administrators.

Vaishyas: agriculturalists and merchants.

Shudras: laborers and service providers.