Which part of earth contains most of its mass

Which of the following statements is true about the treaty of versailles ?

Wire campaign finance laws administered by the fec not well enforced? a campaign finance rules are difficult to enforce b the fec has been plagued by corruption? c the fec does not have enough staff or funding d the fec was only created by the america vote act of 2002

What practical concern lay behind the promotion of longitudinally planned churches in 17th-century rome? a) allowing the circulation of pilgrimsb) interior lighting of the navec) support for the heavy domed) accommodating parishioners