Disorder in the universe increases because
a. spontaneous changes produce more order in a system.
b. work produces disorder in a system.
c. work produces waste heat, which leaves a system.
d. all of the above

The correct answer would be letter C. A is obviously not right, since it says "more order". B is incorrect because work is obligatory to make order. If A and B are wrong, then D must be wrong. You're left with C, which is the only true statement here.

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