The correct option is C viral
Influenza is a viral disease. It is caused by Orthomyxovirus (influenza virus) pathogen. It is a contagious disease, which means it can be spread easily from person to person. Viruses that cause influenza spread from person to person mainly by droplets of respiratory fluids sent through the air when someone infected with the virus coughs or sneezes. Symptoms of the disease include sore throat, headache, fever, sneezing, pain all over the body, etc.