Which of these texts is most likely to contain information about the caste system?

The text that is most likely to contain information about the caste system is called the Bhagavad-gita. There, lord Krishna names 4 types of caste - Brahmins, Kshatriyas, Vaishyas and Shudras, according to their quality of work. 

Because japan felt disrespected by the provisions of the treaty of portsmouth, it would most likely lead japan to  eventual revenge against the country of russia. the correct option among all the options that are given in the question is the third option or option "c". i hope the answer has you.