Which of the following best describe how paragraphs 15-16 contribute to Khan’s Claim? A. They show how the goals of education are always changing and improving.
B. They acknowledge why mastery-based learning continues to be difficult today.
C. They show why mastery-based learning is necessary, despite potential challenges.
D. They challenge potential counter arguments about mastery-based learning.

From let’s teach for mastery-not test scores by sal khan.