Which of the following statements represents a correct and sequentially accurate economic explanation? Group of answer choices If investment increases, total expenditures on goods and services falls, and the AD curve shifts leftward. If consumption falls, total expenditures on goods and services falls, and the AD curve shifts leftward. c and d If consumption falls, total expenditures on goods and services rises, and the AD curve shifts leftward. If net exports rise, total expenditures on goods and services rises, and the AD curve shifts rightward.