Which of the Following Best Describes the Social Structure of Gupta

Which of the following best describes the social structure of Gupta society?

A) Gupta society was highly fluid, and people could move freely up and down the social ladder.
B) Gupta society was rigidly structured, but members of the higher classes could quickly lose their status if they did not observe the proper rules governing social relations.
C) Gupta society was divided into different social classes, but some groups were able to pull themselves up the caste ladder.
D) Gupta society was rigidly structured, with merchants at the top of society and brahmin priests at the bottom.