Government and public support for the labor movement increased dramatically during the
a.
progressive era
b.
industrial revolution
c.
great depression
d.
second world war

(the answer is not a)

(C) Great depression

Explanation:

 The great depression is the type of economical depression that spread world wide in the year 1930s in the united states. The government and the public support increased dramatically due to the great depression for the movement of the labor.

 The timing varies across the nations in the great depression and in the 20th centenary it was the deepest and the longest depression. This mainly occur due to the weakness in the economy.

Therefore, Option (C) is correct.