Realistic sound refers to sounds that stem from an recognizable source

Unrolling like a film sequence, the Night Attack at the Janjo Palace tells the story of:

a. the power of the Ministry of Defense against intruders b. a culture influences by Shamanistic beliefs before adopting Buddhism c. the burning of the imperial palace at Janjo in Kyoto as rebel forces try to seize power by capturing the emperor d. an artist who isolated himself to focus on his held Daoist philosophy

Who developed the concept of solfege, thereby initiating subsequent generations of musicians into the joys of sight singing?

A) John of St. Gall B) John Cotton C) Guido of Arezzo D) Notker Balbulus