The Dollar Is Regarded as the "Safe Haven" Currency; Investors

The dollar is regarded as the "safe haven" currency; investors flock to it when they are worried about the outlook for the global economy. Fears were at their greatest in late 2008 and early 2009 after the collapse of the Lehman Brothers investment bank in September 2008. If investors flocked to the dollar

A) the exchange rate would increase.
B) the exchange rate would decrease.
C) the exchange rate would not change.
D) the exchange rate could increase or decrease.