What is the correct heading for this paragraph?
Some scientists, however, are quick to discourage extravagant speculation. 'There is no evidence whatsoever that swallowing any chemical would have an effect on mammals', says Rich Miller of the University of Michigan. 'And those people who claim it¬†might need to go out and do some experimenting'. Some research, moreover, has produced alarming results. As well as controlling aging, these, genes also partly control the hormones which regulate growth. The upshot of this is that although the lives of mutant mice can be extended by up to 80 percent, they remain smaller than normal.
A. Scientist B. Extravagant C. Discourage speculations