The graph shows gross domestic product in the US private sector from 2009 to 2011.

What conclusion can be drawn about the US economy ?


a) The economy suffered a setback in 2009 before rebounding in 2011

b) The economy suffered a setback in 2009 before rebounding in 2010

c) The economic suffered a setback in 2009 and had not recovered by 2011

d) The economy suffered setbacks in 2009, 2010, and 2011