30 ! plz which is a correct statement about the common cold? a. only one kind of virus can cause a cold. b. colds can be caused by hundreds of different viruses. c. the symptoms of a cold are completely different from the symptoms of the flu. d. none of the above

Option "A" might be the correct answer

Explanation:

there are some of those viruses where it can be quite potent. Some viruses, such as the rhinoviruses, seldom cause serious illness. But others, such as parainfluenza and respiratory syncytial virus, can lead to severe lung infections in young children.

the answer will be a) proteins i believe

i think its the first one