Answer: The correct option is C, i.e., the difference between the assets and the liabilities will remains the same.
Explanation:
Assets are the thing which gives the future profits and liabilities are the obligations.
It in the given data the assets are cash, investment, house and car.

It in the given data the liabilities are credit card, personal loan, mortgage and car loan.

The difference between liability and assets is
.
If Roberto use his his investment to pay off his car loan, then the assets decreased by $5000 and liabilities decreased by $5000.


The difference between liability and assets is
.
Therefore, the correct option is C, i.e., the difference between the assets and the liabilities will remains the same.