Which one of the following statements is true regarding the role of heredity and environment in human development? [CTET-Feb. -2014-II]

• A. The role of environment is almost fixed, whereas the impact of heredity can be altered
• B. The theories based on the 'behaviorism' are largely based on the role of 'nature' in human development
• C. The relative effects of heredity and environ- ment vary in different areas of development
• D. The policy of compensatory discrimination of the Government of India is based on the role of 'nature' in human development