Which of the Following Most Accurately Explains the Lack of a Common

Multiple Choice

Which of the following most accurately explains the lack of a common cold vaccine?​

A) ​Every time a vaccine is developed, the common cold virus mutates.
B) ​The common cold is a virus, and vaccines only work with bacteria.
C) ​The common cold is caused by a great number of different viruses.
D) ​Medical scientists do not find colds serious enough for vaccination.