B. Allowing and encouraging people to fail helps them to make sense of what they are learning.
Explanation:
Remember, we are reminded of the story of Thomas Edison the great scientist who failed many times, learnt from his failures, and then discovered a new invention. The article employs educators especially to have a mental shift about their negative view of failure
Thus, the central idea of the article is that we accept failure, as this would lead to new discoveries and inventions.
