TOKYO :Canada's Alimentation Couche-Tard on Tuesday said it is confident there is a "clear path" to overcome U.S. regulatory hurdles in its proposed $47 billion acquisition of Japan's Seven & i, and expressed frustration at the 7-Eleven owner's "limited engagement." The Circle-K owner has been pursuing Seven & i for months even as it received a frosty reception from the Japanese retail giant. "We have reiterated several times over the past few months that we intend to be friendly and persistent