In prehistoric times volcanic eruptions caused mass extinctions of many species of marine organisms attached to the ocean floor. What is the MOST LIKELY reason for this? A) Volcanic eruptions change the pH and temperature of the ocean. B) In prehistoric times, there were very few species of marine organisms. C) In prehistoric times, most volcanic eruptions took place on the ocean floor. D) Volcanic eruptions remove all traces of dissolved oxygen in the waters of the oceans. Eliminate