Answer:
C. downward; rise; decrease; falls; $40 billion
Explanation:
Autonomous investment spending falls by $10 billion . As a result, the TE curve shifts downward , inventory levels unexpectedly rises , business firms decrease the quantity of goods and services they produce , and Real GDP falls by (10/1 - MPC) = (10/1 - 0.75) = 10/0.25 = $40 billion.