Fine pottery made by combining clay with quartz and feldspar, baked at high temperatures.

• A. Steel
• B. Papermaking
• C. Porcelain
• D. Woodblock Printing

Answer: (C)

Porcelain is a refined ceramic body formed by mixing clay—primarily kaolin—with silica sources like quartz and a flux such as feldspar, then firing it at very high temperatures. The quartz provides silica, feldspar lowers the melting point and helps form a glassy phase, and the intense heat vitrifies the mixture into a dense, hard, often white or translucent material. This combination and high-temperature firing give porcelain its distinctive strength, whiteness, and translucency—qualities highly developed in medieval China, especially in famous producing centers. The other options reflect entirely different crafts or materials: steel is an iron-carbon alloy; papermaking uses plant fibers; woodblock printing relies on carved wood and ink.