Identify the six elements of the chain of infection in order.

• A. Causative agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host.
• B. Reservoir, portal of exit, mode of transmission, causative agent, portal of entry, susceptible host.
• C. Causative agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host.
• D. Portal of exit, causative agent, reservoir, mode of transmission, portal of entry, susceptible host.

Answer: (C)