Cultural relativism is demonstrated as the concept associated with determining the meaning or understanding of social norms, beliefs, ideas, or practices in their particular cultural context relatively.
As per the question, all the given options correctly exemplify the reasons for which Rachel doubting the truth of cultural relativism. 'It rests on invalid argument' as cultural relativism prevents an individual from judging a specific social norm morally or ethically as per the standards but rather views in a defined context. 'Implausible consequences' that it brings would include 'conflicts aroused by disagreement between various social norms'(and not following the moral standards). 'The cultural disagreement' would be the product of this conflict which would not be that significant as it has not room for ethics and moral standards of values and judgments. Thus, <u>all the options</u> are correct.
