ACCorDing to thE pAssAgE,BEnjAmin FrAnklin wAs thE First to provE thAt______.
A、lightning is CAusED By hAil through supErCoolED ClouDs
B、thunDErClouDs ArE not ChArgED with ElECtriCity
C．thunDErClouDs ArE ChArgED with ElECtriCity
D．lightning wAs not An invEntion oF thE DEvil