Which Statement Best Describes Republican and Democratic Television Advertising from 2004

Which statement best describes Republican and Democratic television advertising from 2004 to 2012?

A) The Republicans were constant in the number of ads that they ran up to Election Day and relied primarily on direct campaign funding to pay for those ads.
B) Both parties reliably increased the number of ads leading up to Election Day and switched from having independent groups fund the ads to direct campaign ad funding.
C) The Democrats decreased the number of ads that they ran up to Election Day because they ran low on campaign funds and had to rely on independent groups to fund their ads.
D) Both parties reliably increased the number of ads leading up to Election Day, but the Republicans relied more heavily on independent groups for funding their ads while the Democrats relied more on direct campaign ad funding.