正解は B) です。
なぜならば……
It’s not even close. Research shows that people who follow strategy B
remember 50 percent more material over the long term than people who
follow strategy A. This is because of one of deep practice’s most
fundamental rules: Learning is reaching. Passively reading a book
? a relatively effortless process, letting the words wash over you like
a warm bath ? doesn’t put you in the sweet spot.
Less reaching equals less learning.