What Is the Biggest Difference Between Treatment Outcomes for Persons

What is the biggest difference between treatment outcomes for persons with agoraphobia and persons with specific phobias?

A) Treatment of agoraphobia brings less relief to individuals than do the highly successful treatments for specific phobias,
B) Outcomes for specific phobias are contingent on the type of phobia the individual has.
C) Treatment for agoraphobia is easier to implement than treatment for specific phobias.
D) Treatment for agoraphobia is more successful than treatment for specific phobias, but it is more expensive and time-consuming.