Article Summary Arguing That a Merger Would Lead to Higher Prices, Reduced

Article Summary
Arguing that a merger would lead to higher prices, reduced service, and significantly less competition, the Justice Department and attorneys general from 6 states and the District of Columbia filed a lawsuit in August to challenge the pending merger of American Airlines and US Airways. The lawsuit took some by surprise as the Justice Department has in recent years approved the mergers of Delta with Northwest and United with Continental. The European Union approved the merger in August, and American and US Airways had hoped to complete the merger by September.
Source: Even Perez, "US government seeks to block American-US Airways merger," CNN.com, August 13, 2013.
-Refer to the Article Summary. A merger between two competitors such as American Airlines and US Airways may ultimately be approved by the Department of Justice and the FTC if the two companies can substantiate ________ as a result of the merger.

A) increases in revenue for the merged company
B) an increase in the HHI to over 1,800
C) decreases in marginal revenue for the merged company
D) increases in economic efficiency