1.no road is better then the other.....of they are both covered in ice they are covers in ice our ice is the same as yours
2.I know very few people that switch to winter tires... which again don't help on ice (unless you have studded tires but those are illegal here in MN) the only thing that helps you on ice is going slow
3. C and d are 100% of your problem every accident we have here due to snow/ice is because an idiot is going to fast.... and we always have lots of accidents here 1st snow/ice because people forget how to drive on it