Most Dangerous Aspect Of Icing, For a light aircraft Options

[AName]

So I just finished with the AFOQT (Air Force Officer Qualifying Test) and ran into a question on one of the pilot sections.

The question read something like "What aspect of ice buildup on the exterior of a light aircraft is the most dangerous?" Then lists answers like:

• Added weight
• Disrupted airflow
• Frozen control surfaces

..and two other I can't remember. I don't remember ever learning a "most dangerous aspect" of icing. I remember someone asking which one was worse and was told "that's like asking if a lion is more dangerous then a tiger...it doesn't really matter cause they will both kill you." Unfortunately, that wasn't any of the answers. Is there a question like this on any of the FAA's written exams?