If total assets decreased by $47,000 during a period of time and owner's equity increased by $24,000

Question:

If total assets decreased by $47,000 during a period of time and owner's equity increased by $24,000 during the same period, then the amount and direction (increase or decrease) of the period's change in total liabilities is
a. $23,000 increase
b. $47,000 decrease
c. $71,000 decrease
d. $71,000 increase