Your Son Comes Home from School Complaining That He Is

Your son comes home from school complaining that he is ill. He tells you he thinks he has the flu—he has a sore throat, runny nose, and a cough, and his eyes are very red. Everyone in your family received a influenza vaccine about a month ago, and as the CDC reports that this year's vaccine is approximately 70% effective, you think it is unlikely that your son does in fact have this disease. In addition, your son does not seem to have muscle aches or a headache, which generally occur with flu. Nonetheless, he does look ill and when you take his temperature, you find that he has a fever of 38.9^oC. You take him to see his doctor, because you suspect that while your son likely does not have influenza, he also does not have a common cold.
-The RADT and throat culture are both negative for Streptococcus pyogenes, the causative agent of strep throat. The doctor tells you that your son likely has an adenoviral respiratory tract infection. Adenoviruses are resistant to destruction by detergents and alcohol solutions. This indicates that these viruses 

A) are double-stranded RNA viruses.
B) are non-enveloped viruses.
C) are enveloped viruses.
D) are endospore-formers.
E) are also resistant to multiple antibiotics.