People often assume that it is necessary to use all the numerical information provided in a problem in order to solve the problem. In reality, numerical information sometimes makes it more difficult to solve a problem because the information:.
a. results in a mental set.
b. puts unnecessary constraints on the problem solver.
c. may be irrelevant. d. encourages functional fixedness.

Encourage functional fixedness

Explanation

Functional fixedness is the tendency to think of things only in terms of their usual functions that is judging the likelihood of things in terms of how well they seem to represent or match.

Example include for instance, You have two candles, numerous thumbtacks, and a box of matches and many people might immediately start trying to use the thumbtacks to affix the candles to the wall but due to functional fixedness, you might think of only one way to directly use the thumbtacks.

Answer is c.may be irrelevant.

Refer below.

Explanation:

People often assume that it is necessary to use all the numerical information provided in a problem in order to solve the problem. In reality, numerical information sometimes makes it more difficult to solve a problem because the information: may be irrelevant.