Which of the following sources of risk are diversifiable in nature?
1. A labor strike against Boeing Company
2. An increase in inflation rates
3. An increase in international oil prices
4. Bankruptcy of a mortgage company in Arizona
5. Unexpected entry of a new competitor into the market
a) 1, 2, and 3
b) 1, 4, and 5
c) 4 and 5
d) 2 and 3
e) 1, 3, and 5