Charles is a nursing assistant in a retirement community. Five of his patients have been diagnosed with the stomach flu virus, which can be food-borne or transferred through direct contact. The five patients did not eat together and are not normally seen together. These patients participate in various activities around the community, and Charles transports them all using the same wheelchair. There are no other patients with the stomach flu.

Which statement best describes the environment-host-pathogen triad?

The environment is the food, the hosts are the patients, and the pathogen is the stomach flu.

The environment is the stomach flu, the host is Charles, and the pathogen is the food.
The environment is the wheelchair, the hosts are the patients, and the pathogen is the stomach flu.
The environment is Charles, the host is the wheelchair, and the pathogens are the patients.