Vince is baking a cake. he pours flour and sugar into an empty bowl. the substance in the bowl is a(n) a. mixture b. atom c. element

A would be the correct answer because the ingredients in the bowl are to be mixed together and to be turned into 1 thing.
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There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.