Which of the Following Statements About National Unions Is True

Which of the following statements about national unions is true?

A) National unions are sometimes called union conglomerates.
B) A union must have more than a million members to be categorized as a national union.
C) The number of national unions has steadily declined since the early 20^th century.
D) If faced with declining memberships, national unions cannot merge with each other; they must dissolve.
E) None of the above statements about national unions is true.