Read the following context and choose the best option to answer the question.
Context: At the parking structure Viv got a lot of the new dollar coins after paying for parking . They 're very shiny ! We kept M company while she paid and then we off to the vehicles . I was riding with Viv and we were going to pick up Joe at Vienna Metro .
Question: What may be the reason for her getting dollar coins back ?
Options: 
- Because she over paid in cash .
 - Because she was able to get cashback from her account .
 - Because she specifically asked for them .
 - Because she paid with her credit card .


Because she over paid in cash .