Sarah inherited a large amount of cash after her grandparents passed away. She would rather overdraw her bank account and max out her credit cards, then deposit the cash into her bank account. This is an example of a consumer .

a) failing to treat money as fungible

Explanation:

In the given situation, since sarah has been use the money in the form of credit cards rather using the larger cash amount which is in her hand. So this represents that she should be failed for using the 2 forms of money also the fungibility of money means the various forms of money could be used interchangable.

Therefore the option a is correct

answer; is the sum of all individual demands curves;

answer; comparing the additional benefits and costs;