Johann Mendel is considered a genius much ahead of his time, as he proposed the concept of "factors" (now called genes) based on the fact that . . . . . . .

• A
  he was the first to conduct experiments in plant hybridization.
• B
  he was the first to suggest the concept.
• C
  he proposed the concept before the discovery of mitosis, meiosis, and chromosomes.
• D
  he was the first to use a microscope.