El nino is A wArm oCEAn CurrEnt ______.
A．whiCh CEntErs on AmEriCA AnD AFriCA
B．whiCh wAs nAmED By An AmEriCAn
C．whiCh kills mAny pEoplE EvEry timE
D．whiCh hAs siDE-EFFECts All ovEr thE worlD