Researchers Are Trying to Identify the Causes of Rising Income

Multiple Choice

Researchers are trying to identify the causes of rising income inequality in various economies.Important forces that are almost certainly contributing are:
1) globalization
2) rising rates of personal income tax
3) skill-biased technological change

A) 1 and 2 only
B) 2 and 3 only
C) 1 on
D) 2 only
E) 1 and 3 only