Lawrence$$ Katz, an economist at$$ Harvard, was quoted in a newspaper article as arguing that differences between the incomes of male physicians and female physicians$$ "are largely explained by individual$$ choices." He also noted that discrimination could account for part of the gap$$ "though it$$ isn't clear how$$ much."

$$Source: Josh$$ Mitchell, "Women Notch$$ Progress," New York Times$,$ December$4,2012.$

When Katz used the phrase$$ "individual choices," he meant that female physicians may

A$.$

work fewer hours or take time off for child care.

B$.$

choose to work with female patients.

C$.$

choose to work in a group.

D$.$

choose to marry male physicians.