GRE Logical Reading: ETS-GRE逻辑单题ETS - H0931AU1ZRY4Y13MJ$

Which of the following, if true, most strongly supports the argument? A. It will soon be possible for cytochrome P450 to be synthesized for the treatment of people whose bodies cannot produce this substance. B. Many people whose bodies are unable to produce cytochrome P450 lack the ability to produce certain other substances as well. C. Cytochrome P450 has no effect on the brain other than to protect it from toxic chemicals. D. People with Parkinson's disease often exhibit a marked lessening in the severity of their symptoms when they are treated with dopamine, a chemical produced naturally in the brain. E. Many people with Parkinson's disease have the ability to produce cytochrome P450 naturally.