Which of the following are examples of undiversifiable risk? (Select two from below.)

A. A public health crisis caused by the coronavirus pandemic affects all industries in the economy.
B. The Federal Reserve suddenly increases interest rates.
C. Two major companies in the pharmaceutical industry announce merger.
D. Airline pilots go on strike.
E. The price of lumber declines sharply.
F. The cold weather destroys Florida's citrus crop.
G. People become diet conscious and avoid fast food restaurants.
H. A fast-rising high tech company suddenly files for bankruptcy.