Sentence 1: The bank employee investigated credit card fraud. 
 Sentence 3: She contacted the card owner 
 Sentence 4:  The card owner hadn't made the purchases 
 Sentence 5:  The employee issued the card owner a different card to use 
 Option 1: She found out the identity of a man that had stolen over 500 credit cards. 
 Option 2: She found that one card was used to buy five hundred gift cards.