According to the selection from The Future of the Mind, what were the main reasons that Einstein was so successful as a scientist? Choose three options.
A. He was the most intelligent scientist of his time.
B. He was a gifted mathematician, which is important for a scientist.
C. He had the courage to challenge scientific ideas that he felt were wrong.
D. He used his imagination to create and test ideas through his "thought pictures."
E. He inherited his abilities from his family, which included several great scientists.
F. He had the mental focus to spend ten years developing each of his most important theories.
G. He conducted experiments in a laboratory with the help of many other talented scientists.