Alright two things,
1. The answer is the U.S. Department of Justice
2. It's called the Drug Enforcement *Administration*
<span>Yes, there are noninvasive prcedures that are considered treatment, such as procedures to treat varicose veins. There are also treatments that are considered minimally invasive.</span>
B. Peripheral
Bob changed his opinion because of how the doctor appeared as an expert, and a reliable source rather than (a) the facts, (c) appeal to his emotions, or (d) values.