Answer :
The correct option of the hazard events in the given case is both a and b that is the fact that you were running and the fact that sidewalks were icy.
If one oversleeps and misses classes, then lack of time could cause many hazardous events to occur as the person tries to do everything in hurry to make everything in the time left but in reality, misses everything and does mistakes every now and then. The value such event display is that of lack of punctuality and negligence of importance of time. Also, if the path of destination is icy, then it is advised to cross it with care using some equipment that can prevent one from slipping. Running on icy path is an act of madness in itself. It will certainly cause some harm if the person falls or slips.
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