The verified response to “Ancient History question: Standardized weights and measures in Harappan sites indicate:” is Developed trade and economic organization, option D. The original question-specific evidence states: Standardized weights and measures point to organized trade and administration. Developed trade and economic organization is the correct answer to “Standardized weights and measures in Harappan sites indicate:”. This evidence connects the required Ancient History fact with its archaeological, geographical, cultural or chronological setting. Harappan evidence must be interpreted from excavated settlements, artefacts, environmental data and comparisons among sites; a single object should not automatically support a wider claim than the evidence permits. The choices Only cattle-rearing, Only religious rituals and Only warfare do not satisfy the same combination of site, feature, river region, crop, craft, discovery, chronology or cultural association. The attribution is presented as an exam-oriented historical identification and should be read within the archaeological context stated in the question. A reliable check begins by identifying the question type: location, site feature, archaeological find, economic activity, urban planning, chronology or interpretation. Then compare the chosen answer with the relevant NCERT theme and reject options belonging to another site or category. Replaying that method confirms Developed trade and economic organization as the keyed response for this Ancient History question. This evidence-led approach strengthens factual recall, chronological caution and option elimination for SSC, Railway, Banking, Defence, State and other competitive examinations.