Which of the following does the author cite as a weakness in the argument that bacterial chemosynthesis provides the foundation for the food chains at deep-sea vents? A. vents are colonized by some of the same animals found in other areas of the ocean floor B. vent water does not contain sufficient quantities of hydrogen sulfide. C. bacteria cannot produce large quantities of food quickly enough. D. large concentrations of minerals are found in vent water. E. some bacteria found in the vents are incapable of chemosynthesis