War Power Act is a federal law created to control the power of the president to engage in armed conflicts with other nations without the approval of the U.S. Congress.
Among other stipulations, it requires that the president notifies the congress <em>48 hours</em> prior to sending military forces to action, and forbids them to stay longer than <em>60 days</em> in missions, with and extra <em>30 day</em> period for withdrawing.
It relates to the President in a way that in the 20th/21st century, it's very important to have this kind of regulations, to prevent wars, and rushed decisions of going to battle. Nowadays, weapons are deadlier than ever, and an atomic war is a real possibility, and efforts like these help prevent it.
It gave them more power because before they didn't have much power.
C. Is a Factual Statement
This one is tricky, because scientific law can explain an observation, or be used to make a prediction, but I believe that C. is the most correct of the 4 answers.
Before the Revolution
France was a monarchy ruled by the king. The king had total power over the government and the people. The people of France were divided into three social classes called "estates." The First Estate was the clergy, the Second Estate was the nobles, and the Third Estate was the commoners. (google)
During the middle of the 19th century the National Bank issue, also known as Bank War, consisted in Jackson's goal to dissolve the National Bank and create State Banks. At this time, Kentucky Senator Henry Clay helped to organize the Whig Party which opposed to Jackson's objective and tried to give more power to the Congress than the president, because he thought Jackson had too much control.