The Incumbency Advantage in the House of Representatives ______

The incumbency advantage in the House of Representatives ______.

A) rose from 1 or 2 points in the 1960s to almost 8 points by 2002, but has since declined to the levels seen in the 1950s
B) continues to increase every decade as mapmakers draw districts that perfectly fit the needs of lawmakers
C) was eliminated when the House of Representatives adopted a system of proportional representation
D) decreased from an average of 8 points in 2002, but has started rising again in recent elections as national forces play little role in congressional elections