In the 4th century BCE, Aristotle wrote "...So with animals, some spring from parent animals according to their kind whilst others grow spontaneously and not from kindred stock; and of these instances of spontaneous generation some come from putrefying earth or vegetable matter, as is the case with a number of insects, while others are spontaneously generated in the inside of animals out of the secretions of their several organs.For many centuries thereafter, the theory of spontaneous generation was widely accepted by scientists, including the idea that fleas arose from dust. It would not be until the mid-19th century that chemists Louis Pasteur and John Tyndale debunked spontaneous generation through a series of experiments and paved the way for the modern theory of biogenesis. A. Mark for Review Which choice best states the main purpose of the text? A To introduce a theory and describe its changing status in the scientific community over time B To present a controversial view that is defended over the course of the text C To describe a longstanding problem that research described in the text promises to solve D To identify one remaining point of uncertainty in a debate outlined in the text