During the 1920's, clarence darrow and william jennings bryan were most closely identified with the-
a. increased use of credit by u. s. consumers
b. development of new forms of popular entertainment
c. decline of public support for progressive reforms
d. conflict between modernism and traditionalism

D. Conflict between modernism and traditionalism

Explanation:

In the 1920s there was heated debate wether evolution should be taught in schools, as some saw it as corrupting the morale of the students.

The debate was brought to the public in the "State of Tenesse v.s. Scoops" trial, when a substitute teacher was accused of teaching evolution against the law of Tenesse which forbade it.

Bryan came to represent the traditionalist view, in which the scriptures of the Bible should be taken as fact, understanding science as "hypothetical" when compared to biblical truth.

Darrow came to represent the modernist view of consciously adapting biblical scriptures as metaphorical explanations, taking into account the new scientific discoveries and morals of the age.

nativists tried to get rid of the immigrants as they thought they were going to ruin the u.s.  

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explanation:

cancer