By reading the passage, we can infer that ………

Nail manicuring is an area of beauty care that historians believe to have its roots in the ancient civilizations of Africa, where well-cared for hands were a sign of a rich and leisurely lifestyle. The earliest methods for manicuring nails come from Egypt, where strong nails on both men and women indicated health and wealth. The fingertips of the rich would be soaked in milk and then rubbed with chalk to attain a pale colour. These bleached nails were then coated with a see-through varnish, made from the sap of cedar trees. The hands were then exposed to strong sunlight which dried the varnish and was believed to harden the nails.