Answer: B) muscularis mucosa
Explanation:
The digestive wall which is responsible for most of its movement are muscularis mucosa as, the muscularis mucosa is the outer layer and it is the thin layer which is responsible for generating the movement in smooth muscles. Basically, smooth muscle are responsible for generating the move and fold which help in increasing absorptive mucosa area. And it is supported by the thin layer of the connective tissues.
