21
RCMultiple Choice

Unit Test — Cumulative exam

Question 21 • CA-United States History and Geography B

Jonas Salk became well known in the early 1950s because he

Answer
A
starred in a popular movie called Rebel without a Cause.
B
led a movement of people who refused to conform to social trends.
C
introduced a way to mass-produce homes and reduce their costs.
D
developed a vaccine that virtually eliminated polio from American society.
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