Answer:
b. upper middle class
Explanation:
We know working class, is the regular, average class and is not the rare individuals that are considered rich or high income. We also know it can't be working poor, as poor is pretty much the complete opposite of high-income or in other words rich. Upper middle class seems to be the most valid option as upper means higher up, more richer, and higher-income then the average class.
Interest groups often use lobbying to influence members of Congress.
Explanation:
Interests groups often employ lobbying as a tactic to influence decisions of the executive or the legislature or the judiciary to make sure that the policies being made and the laws that are being passed are in their favor either strategically or economically.
Lobbying groups like big pharmaceuticals often have great influence on how laws are made and which things are outlawed or not as many people in the government also have vested interests in these groups.