What is an example of an illness that is transmitted by droplet transmission?

The correct answer is A. Influenza.

Influenza, commonly known as the flu, is an illness that is primarily transmitted through respiratory droplets when an infected person coughs, sneezes, or talks. These droplets can be inhaled by people nearby, leading to the spread of the virus. While measles and tuberculosis can also be transmitted through respiratory means, influenza is the most common example associated with droplet transmission in everyday contexts.