Which scientist discovered the theory known as radioactivity?

Which of the following statements best describes the spread of communism in the years immediately following world war ii? a. the number of communist countries increased during these years. b. the number of communist countries decreased during these years. c. the number of communist countries stayed the same during these years. d. the number of communist countries increased in asia but decreased in europe. ( answer in the format above for me to understand)

An alliance of two political parties is know as? a. majority b. coalition c. candidate d. government

Put the expeditions of exploration into their correct chronological order