A firm paid dividends of $10,000, paid interest of $20,000, reduced debt principal outstanding (paid off debt) in the amount of $100,000, and sold new stock for $150,000. What was the firm's cash flow from financing activities?

A) +$20,000 ($20,000 flowed into the firm)
B) +$280,000 ($280,000 flowed into the firm)
C) -$280,000 ($280,000 flowed out of the firm)
D) -$20,000 ($20,000 flowed out of the firm)