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Which of the following is the best evidence
that digestion involves chemical change?
A Time is required to accomplish results.
B The products’ mass equals the reactants’
mass.
C Different compounds are involved.
D New substances are produced.
I think it is B. Because A has nothing to do with chemical changes because any change takes an amount of time, C because in a mixture different compounds are involved, It could be D though but A new substance is produced in other changes too thus it must be B.
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