Answer B) Gastrohepatic ligament
The space described is the lesser sac. The ligament that must be cut is a part of the lesser omentum.
The gastrohepatic ligament connects the lesser curvature of the stomach with the liver.
Together with the hepatoduodenal ligament, it forms the lesser omentum, which separates the anterior greater sac from the posterior lesser sac.
Access to the lesser sac, as during pancreatic surgery, can be achieved by cutting the gastrohepatic ligament.
The lesser sac can also be accessed through the gastrocolic ligament (part of the greater omentum), gastrosplenic ligament, splenorenal ligament, and through the transverse mesocolon.