It put it onto the policy agenda. Thanks to the media, the civil rights fight started getting supporters from all around america and form all classes and ethnicities. Without the media, we can't know when the civil rights would be won because the people wouldn't have known what was going on and to what degree.
Another power to add to the list would be: Deciding the legality of executive orders.
An example would be Executive Order 13769, which was titled, "Protecting the Nation from Foreign Terrorist Entry into the United States." President Donald Trump signed this order on January 27, 2017, in the first weeks of his presidency. Commonly called the "travel ban," this order suspended travel to the United States from a number of countries with a majority Muslim population. The order immediately was challenged in the courts as unconstitutional. The Trump administration was compelled to replace Executive Order 13769 with a revised version that it hoped would stand up to court challenges, Executive Order 13780, signed in March, 2017.
The best answer is A. Keynesian economics refers to the practice of pumping money into a country's economy. In Keynesian economics that money is usually acquired from taxpayers, loans, bonds, and additional currency printing. The theory is that spending money on things like infrastructure projects (building roads, power plants, dams, etc.) creates jobs, which helps get money circulating in the economy again, which eventually pulls a country out of economic stagnation.