What are three reasons that Mendel chose to study pea plants? A. Pea plant offspring inherit blended traits from their parents. B. Pea plants had already been used in other scientists' experiments. C. Mendel knew that pea plants have simple genetics. D. Pea plants have many characteristics with two forms each. E. Pea plants can be self-pollinated to produce offspring. F. Pea plants have a quick rate of reproduction.