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While he was investigating ways t improve the telescope Newton made ___ discovery which completely changed man’s understanding of color.

A.a,/

B.a,the

C./,the

D.the,a

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While he was investigating ways t improve the telescope Newton made _______ discovery which completely changed ____ man’s understanding of color.

While he was investigating ways t improve the telescope Newton made ___ discovery which completely changed man’s understanding of color.