Which of the following describes trends in the gender wage gap from the $1960$s to now?

Group of answer choices

The earnings gap converged from the $1960$s to the $1980$s$,$ but has widened since the $1980$s$.$

The earnings gap has stayed constant, with women making about $75\%$ as much as men

Earnings for women working full$-$time in the $1960$s were $55-60\%$ as those for men working full$-$time, but the gap narrowed such that women in the early $2000$s were making about $75\%$ as men

Earnings for full$-$time working men and women in the $1960$s were pretty similar, but the gap has widened such that women today make significantly less