Answer:
German psychologist A) Hermann Ebbinghaus observed that psychological ideas, including philosophies of human mind...
Step-by-step explanation:
It was German psychologist Hermann Ebbinghaus who said, in 1908, that "Psychology has a long past but only a short history." Ebbinghaus was the first person to describe the learning curve, and is famous for discovering the forgetting curve (if there is no effort to retain memory, it will be forgotten over time) and the spacing effect (if study sessions are spaced out, learning is more effective). He is considered a pioneer in the study of memory.