Which of the Following Statements Is True

Which of the following statements is true?

A) Political officials can not influence how much a government agency purchases and from whom.
B) A recent U.S.Supreme Court decision nullified federal laws that restricted political campaign fund contributions for corporate labor unions.
C) Company sponsored political advertising can only focus on topics and not on candidates.
D) Political officials can not accept direct corporate campaign contributions.
E) Companies can not participate in the political process through lobbying.