Radium was discovered by Maria Sklodowska-Curie -the correct answer is b. Actually she discovered it together with her Husband, Pierre Curie, they obtained it from a uranite sample.
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Q: Why were the Knights Templar killed? The fall of the Knights Templar began when they were killed under the direct order of King Philip IV of France. He was in desperate need of money sources and the Templars' wealth attracted his
If this refers to World War II, then women who worked in factories were symbolized by C. "Rosie the Riveter".
Some characteristics of a communist society would be, the middle class disappearing, the government falls away, and where all members depend equally on whatever the society produces,where the rich get richer and the poor get poorer. Unless all citizens worked together,a classless society could not exist. Workers would share all means of production, in success or failure, and all banks and services would be nationalized. I hope this was helpful! Have a good day!