Answer:e. all of these can be reservoirs of infection
Explanation:
a healthy person,a sick animal, a hospital ,a sick person all can be a reservoir for infection. A reservoir is a body or medium through which infection grows and multiply. This include human reservoir,animal reservoir.
Some infectious disease have human reservoir they grow and multiply in them while some needs an intermediary to transmit them this include sexually transmitted infection,some viruses.
Some diseases have animal reservoir and can be transmitted from animals to human example include trypanisomiasis. Soil, water,plant are also habitat for various infection that can affect both human and animals.