whiCh oF thE Following is not mEntionED By thE spEAkEr
A．DiAmonD-proDuCing rivErs ArE loCAtED nEAr thE mountAin siDEs.
B．DiAmonDs CoulDn’t BE FormED without grEAt hEAt AnD prEssurE oF thE volCAno.
C．volCAno Explosions Brought somE DiAmonDs up to thE surFACE oF thE EArth.
D．Explosions oF thE volCAno CAn DAmAgE DiAmonDs As wEll.