Wundt's Former Student Oswald Külpe Went on to Establish His

Wundt's former student Oswald Külpe went on to establish his own laboratory which conducted introspective experiments on __________,which Wundt objected to because __________.

A) memory; memory was supposedly a "higher" function insusceptible to experimental analysis
B) imageless thought; the studies entailed introspection of mental tasks that Wundt believed were too complex for accurate introspective analysis
C) dream images; dreams were too vague and individualized to be appropriate objects of introspection
D) mental patients; Wundt believed psychology should concentrate on normal as opposed to abnormal topics