The given passage excerpts from the article can be interpreted as follows:
A. The things/mistakes that sometimes happen non-voluntarily may lead to innovations that may change the world.
B. The students loved playing with the moldable substances as they could let their imagination run wild.
C. Upon the suspicion of his snack melting, he curiously put the popcorn in his equipment and it popped.
D. This statement is displaying the worsening condition of a business.
Thus, among the given sentences, option c shows the notion that 'curiosity plays a role in invention.
Hence, the correct answer is option c.
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