Which statement best reflects current scholarship on the population of the Indus Civilisation?

Current scholarship does not identify the Harappan population as one simple racial group. Archaeological and biological evidence points to diversity, while the undeciphered script prevents a conclusive identification of language or ethnic identity. Therefore the other options either belong to another chronological phase, a different site, or an older interpretation that does not best fit the evidence. It was diverse, and its precise linguistic or ethnic identity is not conclusively known fits that evidence because it matches the specific chronology, agency and function contained in the question. A comparison with the alternatives is useful: It consisted only of Aryans, It consisted only of one Dravidian racial type and It consisted only of Mongoloids are genuine historical terms or names, but each belongs to a different office, patron, text, region or sequence. Reading the question as a relationship among person, period, place and institutional purpose prevents that mistake. The supporting source also helps separate later textbook shorthand from the more precise historical formulation. The compact memory link is therefore It was diverse, and its precise linguistic or ethnic identity is not conclusively known together with the factual context above, not the isolated option letter.