Which of the following statements are true about La Nina and El Nino:
I. La Nina causes ocean surface waters to be cooler than usual
II. El Nino causes ocean surface waters to be cooler than usual
III. Because of the warmer than usual water temperatures of El Nino, there is a chance of more severe weather.
IV. El Nino can cause disruption to ocean ecosystems and to human health.
1.only
II. only
I, III, IV
II, III, IV