What building method was used to create the conical roof structure that characterizes tholos tombs?

According to Buddhism, the first of the Four Noble Truths is

a. pain ceases when desire is fulfilled. b. happiness is the avoidance of pain. c. there is no escape from pain. d. life is filled with pain.

Enamelwork produced by pouring molten colored glass between thin gold partitions is called

A. zoomorphoic. B. niello. C. cloisonné. D. filigree.