By the fourth week of July conditions in the tropics lay balanced between life and total death. Then quite suddenly rain clouds appeared over the whole globe. The temperature declined a little, due no doubt to the clouds reflecting more of the Sun’s radiation back into space. ______ Warm rain fell everywhere, even as far north as Iceland. The insect population increased enormously, since the burning hot atmosphere was as favorable to them as it was unfavorable to Man many other animals.A. All human movement ceased.B. More than seven hundred million persons are known to have lost their lives.C. A mysterious "black cloud" approaches the earth-our planet’s weather is severely affected.D. Occasionally air-conditioning units failed and it was then that fatalities occurred.E. There was nothing to be done but to lie breathing quickly as a dog does in hot weather.F. But conditions could not be said to have improve