The trend from 1979-2009 for married and middle-income U.S. parents has been to work ________ number of hours per week.

A) decreasing
B) increasing
C) the same

Middle-income Parents

Parents belonging to the socio-economic class situated between the lower and upper classes, typically characterized by modest financial stability.

Number of Hours

The amount of time spent on activities or work, often measured in hours per day or hours per week.