Question

which statement about the common cold is correct?
colds must be treated by antibiotics.
cold symptoms are completely different from the symptoms of the flu.
colds can be prevented by vaccines.
colds can be caused by hundreds of different viruses.

Explanation:

• Antibiotics target bacteria, while colds are viral, so the first option is wrong.
• Cold and flu symptoms (like cough, congestion) overlap, so the second option is wrong.
• There's no vaccine for the common cold due to many virus strains, so the third option is wrong.
• The common cold is caused by hundreds of viruses (e.g., rhinoviruses, coronaviruses), so the fourth option is correct.

Answer:

D. Colds can be caused by hundreds of different viruses.