Which one of these disaster events occurs first, before 25th December 2021␟"War between two G20 member countries commences (as reported by nytimes.com)","The S & P 500 index closes below 1000.00 (as reported by bloomberg.com)","World Health Organization reports over 4 Million deaths resulting from Covid 19","A G20 member country defaults on a national debt repayment (as reported by bloomberg.com)","The Bitcoin Network suffers a catastrophic failure (no blocks produced for >1 week)","Hostile alien life is revealed by a G20 member nation (as reported by nytimes.com)","Covid 19 is revealed to be a biological weapon (as reported in nytimes.com)","None of these disaster events occurs before December 25th 2021"␟disaster␟en_US