Final answer:
A mental set is likely to inhibit c. creativity by favoring familiar solutions over new and innovative approaches to problem-solving.
Step-by-step explanation:
A mental set is a tendency to approach problems using a mindset that has worked in the past. Regarding the options provided in the question: overconfidence is related to an individual's belief in their own abilities; confirmation bias involves favoring information that aligns with one's preexisting beliefs; creativity involves the ability to come up with new and original ideas; and belief perseverance is the tendency to stick to one's beliefs even in the face of contradictory evidence. A mental set is most likely to inhibit creativity because it encourages sticking with familiar solutions rather than developing new ways of thinking about a problem.