Please answer both questions

Karl's Keychain Company produces keychains that sell for $1 each. On January 1, 2015, the company had inventory of 8,000 keychains. During 2015, the company sold 900,000 keychains. At the end of the business year on December 31, 2015, the company's inventory of keychains was 9,000. What was the value of Karl's total production and inventory investment in 2015? O a. production = $891,000; inventory investment = $17,000 O b. production = $900,000; inventory investment = $9,000 O c. production =$899,000; inventory investment = $1,000 X Incorrect O d. production = $901,000; inventory investment = $1,000 Everything else the same, if investment expenditures rise by $300 billion and imports increase by $200 billion, then GDP decreases by $100 billion. O does not change. X Correct increases by $100 billion. increases by $500 billion