Sentence 1: One day snow and ice covered the ground. 
 Sentence 3: He was halfway to work when he lost control of the car 
 Sentence 4:  He slid into the ditch 
 Sentence 5:  Thankfully Jimmy was okay 
 Option 1: Jimmy decided it would be dumb to drive to work. 
 Option 2: Jimmy thought it was safe to drive to work.