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$.$

choose to work with female patients.

B$.$

work fewer hours or take time off for child care.

C$.$

choose to work in a group.

D$.$

choose to marry male physicians.

Part $2$

These individual choices can result in differences between how much men and women are paid because

A$.$

they influence the joint income of a married couple.

B$.$

the average income of all physicians in the group will be lower.

C$.$

they will result in differences in experience and skill over time.

D$.$

female patients pay less.

Part $3$

It is difficult to estimate how much of the gap between what men and women are paid is due to discrimination because

A$.$

there are many other factors that influence wage differences.

B$.$

the age of the physicians is not disclosed.

C$.$

wages are not readily disclosed.

D$.$

some work for hospitals and some are in private practice.