Which of these was a similar feature of the periods that followed the two world wars?

a. a wave of isolationist sentiment
b. rapid changes in political leadership
c. significant growth of union membership
d. suspicion and persecution of communists

D. suspicion and persecution of communists.

Suspicion and persecution of communists was a common feature of the periods that followed the two world wars. After WWI, the fear was mostly due to the Bolshevik Russian Revolution of 1917. People were scared of patriotic movements and revolutions after the trauma of the war. The second scare came after WWII. In this case, the world was also scared of the power of nationalism and ideology after the experience of Nazi Germany. Moreover, the United States saw the Soviet Union as its competition to become the main hegemonic power in the world.

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.

answer: musical connotation

leonard b. meyer (1918-2007) was an american composer, author and philosopher. his work emotion and meaning in music is perhaps the first major treatise on music. it is a philosophical and psychological work, greatly influenced by koffka (one of the major proponents of gestalt psychology). his work deals with the problem of musical meaning and musical communication.