The most significant impact of television in post-World War II United States was that it

A) fostered a sense of national cultural conformity.

B) made people rally against hatred and intolerance.

C) showed the many diverse interests and influences in and on the country.

D) was a major factor in creating support for the "Women's Liberation" movement.

The correct answer is A) fostered a sense of national cultural conformity.

Explanation:

While Television had been around for a couple of years prior to World War II, it was only by the end of the war and during the economic boom that it's cultural impact was felt on a national level.

Just like what the radio did several decades ago, TV was able to do on a much larger scale and have a more meaningful visual impact.

Americans all over the country were able to watch the same sports, news, weather reports and even family friend entertainment programs.

This was able to build a strong cultural and national identity among various different regions of the country.