What is a primary method of how hepatitis B and C can be transmitted?

The primary method of transmission for hepatitis B and C is through infected blood and sexual contact. Both viruses are classified as bloodborne pathogens, meaning they are primarily spread through exposure to infected blood. This can occur through sharing needles or syringes, which is common in drug use, as well as from blood transfusions when the blood has not been properly screened.

Additionally, these viruses can also be transmitted through sexual activity, particularly when there are open sores or bloody fluids involved. The viral particles are present in high concentrations in blood, making it a significant vector for transmission.

The other answer choices refer to modes of transmission that are not applicable to hepatitis B and C. Airborne particles and inhalation of contaminated air pertain to respiratory viruses, while infected food and water are more typically associated with other types of infections, such as those caused by bacteria or viruses that are transmitted via the fecal-oral route. Therefore, option C accurately captures the main routes through which hepatitis B and C are spread.