Social class inequalities depend on economic reasons like job, poverty, prosperity and income. Social classes are not clearly and obviously distinct from each other. Distinctions between classes are uncertain and vague. Social classes are not supported by legal inequalities. Everybody has equal rights before the law. Religious and legal restrictions or limitations are not imposed for marriages between people from different social classes. Modern societies are open systems. There are no religious or legal restrictions for individuals or groups that may affect moving from a class to another. The correct answer is A.