Amanda is fascinated to learn that aristocrats of this country rubbed a tinted mix-ture of gum arabic, gelatin, beeswax, and egg whites onto their nails to color them crimson or ebony, and in the 1100's punished commoners caught wearing a royal nail color by putting them to death. this behavior was common to the

I believe the answer is: Chinese

In the 1100's , the chinese use nail colour as a social symbol which distinguish their affiliation with nobilities. (higher status people which are close to the royal house tend to paint their nails with gold or silver color) . Common People who use a same nail color as the nobles would be Arrested due to the falsification of their status.

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.

the correct answer is c.