Which Statement Regarding Common Colds and Adenoviral Respiratory Tract Infections

Which statement regarding common colds and adenoviral respiratory tract infections is TRUE?

A) Fever is a sign of adenoviral respiratory tract infections, but is not a sign for the common cold.
B) The incubation period for adenoviral respiratory tract infections is 1-2 days, while that for common colds is 5-10 days.
C) Cold viruses are non-enveloped, double-stranded DNA viruses while adenoviruses are non-enveloped single-stranded RNA viruses.
D) Cold viruses may cause infections other than respiratory infections while adenoviruses only cause upper respiratory tract infections.
E) Adenoviral respiratory tract infections may also be caused by bacteria while the common cold is always caused by a virus of some kind.