问题: WhichofthefollowingstatementsisNOTtrueaccordingtothepassage?
A: Geologistsknowthatvolcanoactioniscausedbyradioactiveelements.
B:Geologistsknowthatthereishighertemperaturewithintheearth.
C:Therealcausesoftheheatinsidetheearthhavenotbeenfound.
D:Scientistshavemadevariousguessesaboutthecausesofheatinsidetheearth.
