A.
It is because the formation of habits is based on common solutions. 因為習慣是基於通常的解決方案形成的。
B.
It is because the formation of habits is based on uncommon solutions. 因為習慣是基於不尋常的解決方案形成的。
C.
It is because stronger habits are violated most easily. 因為根深蒂固的習慣最容易被侵蝕。
D.
It is because stronger habits force us to be creative. 因為更强的習慣迫使我們更加有創意。