The answer is C. Ink is added to the engraved grooves.
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Wooden or rattan furniture and handicrafts, woven abaca or pinacloth, and various handcrafted or carved toys and trinkets seen in rural regions, were manufactured from indigenous raw materials. Weaving is often done using natural fibers such as rattan, bamboo, nipa leaves, abaca, and pina.
The concept of a readymade are manufactured objects. The artist used this to reposition and tilt the object and this became art. They lastly signed it.