Suppose that Moby went from a stay-at-home father to a paid worker. He now earns $300 a week but pays $100 a week for daycare and $100 a week for a housekeeper. Moby is O A. better off by $500 and GDP increases by $200. O B. better off by $100 and GDP increases by $500. O C. better off by $100 and GDP increases by $450. O D. better off by $200 and GDP increases by $500