Which of These Is NOT a Difference Between the Working

Multiple Choice

Which of these is NOT a difference between the working class and the middle class,generally?

A) The working class is less likely than the middle class to have a pension or health insurance.
B) Middle-class jobs are more secure than working-class employment.
C) Members of the working class are more likely to experience promotions and increases in income over the course of their employment.
D) Much of the working class is employed in blue-collar industries.