In what way was Roman law a civil law system?

During the period of the republic (753–31 BCE), the jus civile (civil law) developed. Based on custom or legislation, it applied exclusively to Roman citizens. … Roman law, like other ancient systems, originally adopted the principle of personality—that is, that the law of the state applied only to its citizens.

i think the answer is a and i hope this ; ))

china has confucianism thats everywhere in asia but it isn't really a religion.