whiCh onE oF thE Following thAt hAs BEEn working At thE mAking oF thE AtomiC BomB From BEginning to EnD
A．AlBErt EinstEin.
B．hArolD
C．urEy.C. ErnEst o. lAwrEnCE.
D．j. roBErt oppEnhEimEr.