B. it was a time where they caught for the moral issue of slavery which led to political control of the system
Answer:
a. invalidated key pieces of FDR's New Deal legislation.
Explanation:
In the New Deal era, different kinds of programs such as financial reforms and public projects were made to create relief and suppress the harmful effects of depression. This two-year era serves as a recovery era for the public. During this era, the Supreme Court made series of decisions which invalidated key pieces of FDR's New Deal legislation.