The right option is; B.
A virus that causes a common cold best describes a rhinovirus.
A rhinovirus is any of many common infectious viruses in humans and the primary cause of the common cold. Rhinoviruses can be transmitted directly from person to person through contaminated objects or through aerosols of respiratory droplets. Other diseases such as ear infections, sore throats and infections of the sinuses may also be caused by rhinoviruses.