How did John D. Rockefeller horizontally integrate his monopoly in 1880? A. He purchased iron mines around the country to add to his business.
B. He created a trust that controlled ninety percent of the nation's oil refineries.
C. He created a trust that controlled oil wells, refineries, and distribution networks.
D. He purchased coal plants around the country to add to his business.

A. identify the constitutional clause that is common to both mccutcheon v. federal election commission (2014) and citizens united v. federal election commission (2010). based on the constitutional clause identified in part a, explain why the facts of citizens united v. federal election commission (2010) led to a similar holding to the holding in mccutcheon v. federal election commission (2014). describe an action that members of the public who disagree with the holding in mccutcheon v. federal election commission could take to limit its impact.