Assuming No Other Changes Except a Decrease in Assets of $20,000

Assuming no other changes except a decrease in assets of $20,000, increase in liabilities of $10,000, and expenses of $60,000, by how much did owners' equity increase or decrease and what were revenues for the period?

A) Owners' equity increased $30,000; revenues were $90,000
B) Owners' equity decreased $30,000; revenues were $30,000
C) Owners' equity increased $10,000; revenues were $70,000
D) Owners' equity decreased $10,000; revenues were $70,000