What happened as fish rubbing developed into an art? A The practice remained exactly the same.
It declined as people lost interest in fishing.
Some materials used for it changed.
D Only the ruling classes could afford to do it.

How Fishermen's Bragging Rights Gave Birth To Fine Art : The Salt In 19th-century Japan, fishermen found a foolproof way to record trophy catches: a "fish rubbing" inked onto paper, creating a permanent record of their size. Gyotaku soon evolved into fine art.

Environment protect agency