The Global Financial Panic in September 2008 Led to a Sharp

Multiple Choice

The global financial panic in September 2008 led to a sharp fall in business investment spending and in consumer spending.How could these sharp falls be viewed?  

A)  as a sharp decrease in aggregate supply 
B)  as a sharp decrease in aggregate demand 
C)  as a sharp decrease in aggregate supply and in aggregate demand 
D)  as a modest increase in aggregate supply