The statements in the options A, B, C, and E are incorrect regarding the two learning types, that are, cognitive and behaviorist approaches. Not the behaviorist but the cognitive approach is concerned with internal events. Not the cognitive approach, but the behaviorist approach is mainly concerned with observable behaviors. Considering the option C, according to behaviorists, only observable behaviors can be objectively measured. As for E, behaviorist researchers are not interested in internal mental aspects such as motivation or thoughts.