During Many Surgeries,a Skeletal Neuromuscular Junction Blocker Is Given in Conjunction

During many surgeries,a skeletal neuromuscular junction blocker is given in conjunction with the general anesthetic so that

A) a lower dose of anesthetic can be used while still ensuring skeletal muscle paralysis
B) the patient can be positioned easily on the operating table
C) the thoracic wall is more compliant and does not offer as much resistance to mechanical ventilation
D) all the above are true
E) skeletal neuromuscular junction blockers are never given in conjunction with general anesthetics