According to the Justice Department and the Federal Trade Commission

Multiple Choice

According to the Justice Department and the Federal Trade Commission, a merger would likely be challenged if

A) the post-merger industry has an HHI above 1,000 and the HHI rises by more than 100.
B) the post-merger industry has an HHI above 500 and the HHI rises by more than 50.
C) the number of firms in the post-merger industry is very large.
D) the firms' markets are very large.