Which of the following did the author provide a guardedly optimistic view

A．American economists are painting a gloomy picture.
B．It is slowly warming up with moderate growth.
C．Recession may come back anytime in the coming months.
D．Most sectors are picking up at a surprisingly fast pac

A．they have to revise the GDP forecasts so often
B．their government is announcing the end of a recession
C．US economy is showing some signs of an upturn
D．GDP growth reflects stronger domestic demand