What evidence led astronomers to understand that the universe is speeding up in its expansion?

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?

How will globalization most likely affect language around the world? no new languages will be created. nations will adopt a universal language. more languages will become extinct. english will become less prevalent. languages will grow more isolated and distinct.

Select the best hypothesis explaining why countries may have preferred communism. communism promised jobs after the insecurities of war. communists forced the people to do what they said. communism was fueled by a dislike for democracy. communism provided economic freedom for businesses and workers.