Face validity refers to the degree to which an assessment or test subjectively appears to measure the variable or construct that it is supposed to measure. In other words, face validity is when an assessment or test appears to do what it claims to do.Tests wherein the purpose is clear, even to naïve respondents, are said to have high face validity.
I believe the answer to your question is B. If the United States was to be partitioned in the same way India was, the partition would be based on religious groupings. Hope this helped!
