Wundt Argued That Cognitive Processes Such as Learning and Memory

Wundt argued that cognitive processes such as learning and memory could not be studied by experimental methods because ____.​

A) ​they were influenced by language and aspects thereof
B) he considered them to be lower lever cognitive processes
C) ​one cannot control the relevant factors
D) one cannot objectively observe the behavioral manifestations of these phenomena
E) they are not the proper subject matter of psychology,regardless of the methodology one uses