Which of the Following Is Not One of the Three

Which of the following is not one of the three legal conditions that must be present to receive the designation of being a terrorist group?

A) Must be a foreign organization
B) Must engage in terrorist activities as defined by Title 22 of the U.S.Federal Code
C) Must be a complex hierarchical group of individuals that comprise more than 20 members
D) The organization's terrorist activity must threaten the security of U.S.Nationals or the national security of the United States