The probability of making honest mistakes is _________________________________.

highest when attempting something worthwhile

confined to only a few people

a good reason not to attempt anything new

A

A is the only one of the three that makes sense, yes.

The correct answer is "a good reason not to attempt anything new." The probability of making honest mistakes is inherent in any new endeavor or pursuit. When attempting something worthwhile or unfamiliar, it is natural to encounter obstacles and make mistakes along the way. This is an essential part of the learning process and should not be seen as a reason to avoid trying new things.