Consider the Chinese economy. With "O" the original curve and "1" the new curve, which graph of the Chinese economy is consistent with an increase in U.S. real GDP? PA P AD 0 AD 1 AS 0 AS 0 AD_1 (1) (2) AD 0 Y Y PA AS 1 AS 0 (3) (4) AS 0 AS 1 AD 0 AD 0 >Y >Y O Graph (1) O Graph (2) O Graph (3) O Graph (4)