During his first set of experiments, Mendel crossed true-breeding plants that expressed different versions of a studied trait. For example, he crossed tall plants with short plants. Based on his results, he said the tall plants exhibited the dominant form of the trait, plant height. Which of the following best describes the F, offspring of this cross? O A. All were tall O B. About 25% were short. O C. All were short. D. About 25% were tall.