46. El Niño events
(A) occur when the Southern Oscillation index is high.
(B) occur when barometric pressure is lower in the western Pacific than in the eastern Pacific.
(C) include the appearance of warm currents on the Pacific coast of South America.
(D) are always accompanied by La Niña events at the same time.
(E) are accompanied by westward movement of the location of storm generation in the Pacific.