When provided with the unscrambled solution to anagrams, people underestimate the difficulty of solving the anagrams by themselves. this best illustrates

a. illusory correlation.

b. hindsight bias.

c. the placebo effect.

d. wording effects.

e. overconfidence.

When provided with the unscrambled solution to anagrams, people underestimate the difficulty of solving the anagrams by themselves. This best illustrates B. hindsight bias.
This means exactly what it says - the anagram seems difficult until you see the answer to it, and then it seems easy.