challenge: According to Afrasiyab Badalbeyli, how did Sadigjan sometimes achieve various sounds on the tar?
  
  A. By using only his left hand, hitting the strings in a special way or pressing the strings
  B. By using his feet to press the strings against the frets
  C. By using his left hand with a mizrab to pluck the strings
  D. By using his right hand with a mizrab to pluck the strings
  Answer: 