Answer:
He encouraged the passing of the Revenue Act, which increased taxes.
Step-by-step explanation:
During the Great Depression period which started around 1929, in the United States, the then-President Herbert Hoover, in his attempt to guide the country out of the recession, made series of attempts to ensure the country maintains good economic standing.
However, considering the available options, the thing he did not do is that " He encouraged the passing of the Revenue Act, which increased taxes."
This is evident in the fact immediately after the Great Depression started, he asked Congress for a $160 million tax cut while he also increases spending for construction and infrastructures.