The answer is B)High- rise buildings...
The answer to you question
D
Measures that ensure equal opportunities for women in employment is called the B) Affirmative Action law. It ensures equal opportunities not for just women, but also minorities.
The thing which was a major factor that threatened the major unity in the United States in the mid-19th century was:
<h3>The Great Depression</h3>
This refers to the period around 1929 in the United States which has a profound effect on the national economy.
This led to the failure of many banks, increase in unemployment and high deflation rates which all threatened the national unity.
Read more about Great Depression here:
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