Briefly explain one specific historical event or development during the 1970s that promoted the growing clash between liberals and conservatives over social and cultural issues

Women's rights

Explanation:

In the 1970's the liberal citizens and feminists of the United States started demanding about more rights for women politically as well as socially. An amendment , "Equal Rights Amendment was approved by the congress and liberals hoped it would pass with ease in the senate. But conservatives felt it was an attack on the traditional and orthodox gender roles and they viciously tried to stop it and ultimately were successful in defeating it. This led feminists to leave the politics and focus on activism more.

the answer is option a.

i believe it would be capitalism