13. Based on experience, which of the following are the most common signs that someone may be trying to pass counterfeit travelers' checks? a. You are given one check for $100 and the passer wants most of it back in cash. X b You are given five checks for $20 each and the passer buys a group, of unrelated items. c. You are given several checks for any denomination and the passer buys the least appealing item(s) in the store. d. None of the above because experience shows that there are no typical patterns involved in passing counterfeit travelers' checks