Scientists analyzing trapped gases in ice cores drilled in Antarctica's ice sheets were able conclude that during the last 800,000 years when carbon dioxide concentrations in the atmosphere increased, the average global air temperature increased or decrease
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The answer is b or dmost likely bhope it

Ascenario that doesnt  include any modern objects like electricity

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion