In prehistoric times there were many volcanic eruptions in the oceans. Lava spilled into the ocean waters, turning into igneous rock. This was followed by mass extinctions of many organisms attached to the ocean floor. What is the MOST LIKELY reason for this?
A) Contact with the lava killed the organisms.
B) The lava from the volcanoes took the oxygen from the air.
C) In prehistoric times, there were very few organisms living in the oceans.
D) The hot lava from volcanic eruptions changed the temperature of the ocean.