I believe the correct answer is C. paradox. Paradox is a figure of speech when two opposite things are brought together to show a particular meaning. Here, the word frugal means thrifty, or rather poor. And according to many authors, a human soul is priceless, meaning that it costs a lot, so you can see how these two opposite concepts are brought together here.
Explanation: absence of justice : violation of right or of the rights of another : unfairness. How to use ... Synonyms & Antonyms Choose the Right Synonym Example Sentences Learn More about injustice. Keep scrolling for