Because schoolchildren judge their own talents and limitations more realistically than preschoolers, . they should decide which reading and math groups they wish to joinb. their tendency to overestimate their ability or judgments decreasesc. following a failure, they are less pessimistic about future failured. they are less likely to concede that they're not good at something

 b) their tendency to overestimate their ability or judgments decreases

Explanation: School children have the characteristic of judging theirselves on the basis of their actual talent that they persist.This increases the rate of    reality and correctness in the decision as compared with the kindergarten or preschoolers children.

The decision is evaluated on actuality rather than over-estimating their features, ability and talent.

Other options are incorrect because they do not decide about math and reading groups, doesn't decrease the pessimist thinking about failure and neither think that they perform badly at something .Thus, the correct option is option(b).