I would say C. driving in dusty conditions (you can't see very well)
Driving in hot or cold shouldn't matter unless there is a snow storm or dust storm
Hauling and towing are not that hard i wouldn't consider it "severe driving" conditions
Frequent short trips not a problem
Well, it depends what they consider "severe"
D is pretty severe
For C, it depends how much dust
For A, it depends. Short trips through mountains are much more severe than short trips though a small town.
B both of those things can be severe. Depends where you're hauling or towing,
E maybe?
Hope this helps.
