The Recession Of 2007-2009 Made Many Consumers Pessimist

The recession of 2007-2009 made many consumers pessimistic about their future incomes. How does this increased pessimism affect the aggregate demand curve?

A) This will move the economy up along a stationary aggregate demand curve.

B) This will move the economy down along a stationary aggregate demand curve.

C) This will shift the aggregate demand curve to the left.

D) This will shift the aggregate demand curve to the right.

Explanation on the answer will really be helpful.