Which of the following statements is TRUE concerning part-time work in the United States?

A) The majority of part-time workers are involuntary because they couldn't find suitable full-time work.
B) The percentage of part-time employees is likely to decrease as jobs are moved to other countries.
C) Many part-time workers do so voluntarily because they do not want to work more hours.
D) Employers tend to prefer full-time workers as they cost less in training and benefits.

According to the Bureau of Labor Statistics, in 2019, 16.6 million workers were part-time for economic reasons (i.e. they couldn't find suitable full-time work), while 21.0 million were part-time for non-economic reasons (i.e. they voluntarily worked part-time or had other reasons for working part-time). Therefore, statement A is false. Statement B may or may not be true, but it is not directly related to part-time work in the United States. Statement D is also false as part-time employees often do not receive benefits but may actually cost more in terms of training and turnover. Therefore, the best choice is C.