Martha's net worth is currently $200,000. Last year her net worth was $175,000. During the year she had net cash outflows of $42.000, which included her mortgage expenses. Her total cash inflows were $45,000. Her investments grew in value by $15,000 during the year The value of all other assets remained the same. What amount of debt principal did she pay off during the year? Select one a $7,000 Ob $3,000 OC. None od $10,000