One Group of Subjects in a Study Is Given Orange-Flavored

Multiple Choice

One group of subjects in a study is given orange-flavored water and made ill on even days, and given orange-flavored water with a mildly bitter tasted without being made ill on odd days (Group Ob) . Another group of subjects is given orange-flavored water on even days and given orange-flavored bitter water on odd days without being made ill (Group ob) . A third group of subjects is given bitter water on odd days without being made ill (Group b-only) . If learned safety requires an excitatory context or background, then consumption of bitter water alone would be

A) the same in all three groups.
B) greater in Group ob than in b-only.
C) greater in Group ob than in Ob.
D) greater in Group Ob than in Groups ob and b-only.