Which of the following is a street name for meth?

The answer "C. Crank" is recognized as a street name for methamphetamine, which is a powerful, highly addictive stimulant that affects the central nervous system. The term "crank" originated in the 1970s and refers specifically to a form of meth that is often smoked or injected. This name is part of the larger lexicon of meth-related terminology that varies by region and subculture.

The other options may refer to various substances or do not accurately map to methamphetamine specifically. For example, "flake" usually describes certain types of drugs or materials but is not primarily associated with meth, while "Negra" and "Snow" don't typically refer to methamphetamine in common street language. Understanding these terms is crucial for law enforcement and health officials when addressing issues related to drug abuse and public safety.