TOEIC、TOEFL対策テスト : Vol.16

次の記事を読んで、質問に答えてください

FTC says search engine alliance doesn't breach antimonopoly law. The planned tieup between Internet search engines Yahoo Japan Corp. and Google Inc. of the United State will have no immediate problem with Japan's antimonopoly law, the Fair Trade Commission concluded Thursday. The antimonopoly watchdog. investigated the tieup in response to requests by U.S. computer software giant Microsoft Corp. and Japanese Internet mall operator Rakuten Inc., which have suspected the alliance as affecting fair market competition..
 (ソース:ネット The Japan Times ONLINE ; Friday, December 3, 2010)

質問  What is the antimonopoly watchdog?
 
質問  Who claimed the investigation?
 
質問  What was the conclusion of the investigation?
 
質問  What is a synonym for 'alliance' in this article?