Because B.C stands for Before Christ and A.D means the year of our lord so historians took a turn from the traditional christian time method and made it B.C.E (before common era) and C.E (common Era)
The provision that the United States Constitution contains from the original Virginia Plan would be that "<span>C) House and Senate representation is proportional to population size", although it is only the House that is proportional to population size, not the Senate. </span>
