The correct option is C submucosal plexus
A plexus is a branching network of vessels or nerves. An inner plexus called the submucosal plexus or Meissner’s plexus, lies in the submucosa. The submucosal plexus controls mainly gastrointestinal secretion and local blood flow.
The myenteric plexus or Auerbach’s plexus is located in the muscularis layer. The myenteric plexus controls mainly the gastrointestinal movement.