Informal language is often used when we speak or write. It is a lot different then formal language. For instance aint is informal language.
Mr Sewall was referring to a biblical scenario, The one of Joseph, to talk about how slavery should not be considered whatsoever.
Answer:
C. The results of scientific studies should be interpreted cautiously.
<span> The foundation for poverty and nutrition debates in India has been laid by a number of economists who tirelessly engaged with these issues in the early years of Indian independence. The debate surrounding the normative basis for poverty measurement has not only been an esoteric one among a small group of Indian economists but has also been fought vigorously in the corridors of the Planning.
</span>education/politeness/councils/hospitality.