Women do not take part in extramarital affairs. The reason that worthy husbands and sons take care of everything for them, while unworthy ones can always tind ways to hide their deeds from the women. Many men today indulge in pleasure and gambling; some end up mortgaging their lands, and even go so tar as to mortgage their houses without their wives knowledge. Therefore, when husbands are bad, even if wives try to handle outside matters, it is of no use. Sons must have their mothers' signatures to mortgage their family properties, but there are sons who falsify papers and forge signatures, sometimes borrowing money at high interest trom people who would not hesitate to bring their claim to court. Therefore, When sons are bad, It Is useless for the mothers to try and handle matters relating to the outside world. What practice developed during the Song dynasty corroborates the status of women reflected in the passage?

a. corsets
b. white face paint
c. polygamy
d. foot binding