Use of Yap Stones on the Island of Yap Was

Multiple Choice

Use of Yap stones on the island of Yap was essentially a commodity-backed money

A) employing Yap stone certificates issued by the Yap tribal council.
B) which was problematic because the Yap stones were not in limited supply.
C) whose record of ownership was recorded on stone tablets.
D) whose record of ownership was stored in the collective memory of the islanders.
E) which was easy to transport.