Which of the following modifications to the list of assets and liabilities below would result in a positive net worth?

Home owned $105,000.

Mortgage owed $100,000.

Car valued at $26,000.

Car loan of $22,000.

Investment fund of $4,500.

Savings of $1,500.

Credit card balance of $15,000.

a.

Lowering mortgage by $1,000.

b.

Increasing investment fund by $500.

c.

Adding $100 to savings.

d.

All of the above.