Appeals court hears oral arguments in archdiocese's suit over Advent ad

Appeals court hears oral arguments in archdiocese's suit over Advent ad: WASHINGTON (CNS) -- The U.S. Court of Appeals for the District of Columbia Circuit heard oral arguments March 26 in the Archdiocese of Washington's suit against the Washington Metropolitan Area Transit.  Click on the link and you please tell me what is offense in the ad.