Interest groups representing businesses and investors are often among the most successful lobbying groups in foreign policy. Why would this
be considered a problem?
A. These groups often have interests that are similar to the public interest and they are accountable to the public through voting.
B. These groups' members contribute heavily to many legislators' campaigns and in so doing gain greater access to legislators.
C. These groups work together, promoting a coherent foreign policy agenda.
D. The members of these groups make up the majority of voters in many districts.

The members of these groups make up the majority of voters in many districts thus this  be considered a problem.

Option: D

Explanation:

Interest groups play a key role in US politics. Such organizations are made up of wealthy and powerful members who often seek to impose some form of leverage in politicians to promote their goals and agendas. Across the years via many campaigns, they have understood how to speak and manipulate elected leaders and apply leverage to get the kind of legislation that is in their favor. Here the majority of voters in several districts are standing due to group members, as we recognize the interest group belongs to a body in which it uses different methods of lobbying to influence others.

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