When Faced with Seemingly Insurmountable Challenges, It Is Useful to Break

When faced with seemingly insurmountable challenges, it is useful to break big problems down into small steps. Which of the following is not a reason why this is a good strategy?

A) Tackling small day-to-day things keeps our minds off of the looming big stuff.
B) Incremental challenges are immediate and tangible enough to engage people, but don't overwhelm them.
C) Defining problems incrementally keeps arousal in the optimal moderate range-- not too low, not too high.
D) Small wins offer intermittent bursts of success that are reinforcing, and thus motivating.