For the Investor's Purposes,a Normal Business Cycle (Peak to Peak

For the investor's purposes,a normal business cycle (peak to peak or trough to trough) lasts approximately _________ as reported by the National Bureau of Economic Research based on the last 8 peace time business cycles.

A) Ten months
B) Eleven months
C) Forty-six months
D) Thirty four months
E) Sixty-three months