4 Please help me my last final, I need the answer as quick as possible only have 1 hour

If a business has cash used by operating activities of $20,000, cash used by investing activities of $100,000 and cash provided by financing activities of $150,000, what is the net increase or decrease in cash held? Select one: a. $70,000 increase b. $42,000 increase c$30,000 increase O d. None of these