Why was the concern of global warming replaced with the concern of global cooling?

The idea of global cooling gained popularity about during the 1970s, “There are ominous signs that the earth’s weather patterns have begun to change dramatically,” Newsweek reported in 1975. At the time the highly influential source convinced “drastic decline in food production.”, at that time climate scientists were convinced that a ice age was coming. Global temperatures falling between 1940 to 1975 drove the concern of global cooling, little did they know it was only a temporary fall of temperature. 
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The shia sect of islam is primarily different from sunni islam in the belief that the first legitimate imam following muhammad was imam ali. unlike the three caliphs that succeeded muhammad, ali was part of muhammad's clan (related to him). major shia caliphates include the fatimid and safavid caliphates.  the answer will be option c. shia read more on

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