A．Its amber contains numerous fossils.
B．Its amber is the most durable.
C．Its amber is opaque.
D．It is the site of the oldest amber deposits.

A．Amber mined from the Appalachian Mountains.
B．Amber with no imperfections.
C．Amber containing organic material.
D．Amber with no inclusions.

A．The difficulties faced by the colonists.
B．The skill of military heroes.
C．The courage of one man.
D．The cause of the Revolutionary War.