The correct answer is C) 20 percent.
The other options of the question were A) 10 percent. B) 100 percent. D) 50 percent.
The minimum amount of time spent representing interest groups that would require lobbyists to register in accordance with the Lobbying Disclosure Act is 20 percent.
In the United States Legislation, the Lobbying Disclosure Act obliges interest groups and Lobbyists to register with the government of the US.
This act was passed in December 1995. It was a piece of legislation that forced those groups to formally register with the federal government to do their practices in the correct way. Years later, the Honest Leadership Act of 2007 amended the original act.
Governmental officials have to be aware of the offerings of those groups because their first and foremost duty is with the citizens of the US not with the interests of the lobbyists and interest groups that often have their own agendas.