Based on your understanding of common roadblocks to problem solving, which of the following choices is most plausible regarding the relationship between functional fixedness and mental set?
a. Functional fixedness could lead to mental set, because it necessarily narrows down which actions are possible.
b. Mental set is usually avoided as a positive side effect to addressing functional fixedness.
c. Mental set and functional fixedness are unlikely to be related because participants who exhibit high levels of one tend to exhibit low levels of the other
d. Functional fixedness reduces the likelihood of mental set, because it is an already-made choice that frees up cognitive resources for other parts of the problem