Which type of viral hepatitis is most often linked to intravenous drug use?

Hepatitis C is most often linked to intravenous drug use due to the way the virus is transmitted. It is primarily spread through direct contact with the blood of an infected person. This is particularly relevant in the context of intravenous drug use, where shared needles and other injection equipment facilitate the transfer of the virus.

Unlike Hepatitis A and E, which are primarily transmitted through the fecal-oral route (often due to contaminated water or food), or Hepatitis B, which can be spread through sexual contact and exposure to infected bodily fluids, Hepatitis C's main mode of transmission aligns closely with practices that involve blood contact. As such, the prevalence of Hepatitis C is significantly higher among individuals who engage in intravenous drug use compared to the other types of hepatitis listed.

Hepatitis D only occurs in those already infected with Hepatitis B, making it less directly associated with intravenous drug practices than Hepatitis C. Therefore, the link between Hepatitis C and intravenous drug use is well-established, making it the correct choice for this question.