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.

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes