Final answer:
The term 'social justice' predates Martin Luther King Jr. and the 'veil of ignorance' concept is associated with John Rawls's theory as presented in his 1971 work, A Theory of Justice.
Step-by-step explanation:
The term "social justice" has been interpreted in diverse ways, including as a concept focused on maximizing social welfare, ensuring individual liberty, or promoting a society free from class repression as in Marxist theory. John Rawls's theory of social justice is based on the hypothetical choices people would make behind a "veil of ignorance." The question inquires about the conception of social justice wearing this veil, which pertains to Rawls's theory.
By considering the information provided, the answer to the original question is C) 1962, Martin Luther King Jr. did not coin the term "social justice"; Instead, the term "social justice" has been around long before and has been discussed by various thinkers. The conception of social justice that includes the "veil of ignorance" is Rawls's theory, often associated with his work A Theory of Justice published in 1971. Therefore, the correct answer to the question 'Which conception of social justice invokes the "veil of ignorance"?' is option c. Rawls's theory.