न्यूनतम अमूर्तता (가장 구체적) से अधिकतम अमूर्तता की ओर दृश्य संचार के निम्नलिखित प्रकारों के सही क्रम की पहचान कीजिए: A. वस्तुएँ (Objects) B. मानचित्र (Maps) C. ग्राफ (Graphs) D. फोटोग्राफ (Photographs) E. मॉडल (Models) नीचे दिए गए विकल्पों में से सही उत्तर चुनिए:

The approach of combining multiple methods, data sources, or investigators in the study of the same sociological or scientific research phenomenon is known as:

Given below are two statements: Statement (I): The near-complete absence of fluoride in drinking water causes tooth decay. Statement (II): Excessive concentrations of fluoride in drinking water cause mottling of teeth, also known as dental fluorosis. In the light of the above statements, choose the most appropriate answer from the options given below: