Explanation : (A) Wilhelm Wundt, a German doctor and psychologist, established world's first experimental psychology lab in 1879 at the university of Leipzig, Germany. He is widely regarded as the "father of experimental psychology".
Explanation : (B) Gestalt school of psychology was founded in the early 20th century by the German psychologist Max Wertheimer and his younger colleagues, Kurt Koffka and Wolfgang Kohler.
Explanation : (C) The consolidation theory is a part of the mechanism of memory formation. The consolidation theory is the process in which memory is strengthened over the time to the point that they become almost permanent as stored in long-term memory.
Explanation : (C) Field theory in psychology, a conceptual model of human behaviour developed by German-American psychologist Kurt Lewin, who was closely allied with the Gestalt psychologist.