The basic process of disease transmission involves: a. a source, a mode of transmission, and a susceptible host.
b. a highly virulent pathogen and a breakdown in infection control techniques.
c. a source, a weakened host immune system, and delayed recognition of the infection.
d. poor hand washing, a susceptible host, and inappropriate antibiotic us

The basic process of disease transmission involves:

a. a source, a mode of transmission, and a susceptible host.

Explanation:

The sources of a disease include individuals, animals, and the environment.  Transmission occurs when there is a transfer of the pathogen from one individual or source to another.  Disease transmission cannot be complete without the host.  As always, a successful transmission happens when the host becomes susceptible to the disease, which will weaken its immune system.

gold i'm pretty sure i might be wrong