单项选择题

Time Warner Inc. Chief Executive Officer Richard Parsons said on Friday that the company expects its big-budget movie "Troy," which made its debut in theaters last week, will prove to be a solid success for the company.
"We’re very pleased with ’Troy,’" Parsons told shareholders at the company’s meeting at the Warner Bros. film studio in Burbank. "We think ’Troy’ will be a success."
Parsons said Warner Bros. expects U.S. and Canadian box office receipts to be "north of $100 million," and international ticket sales to run "two to three times that.\
The word "debut’ in line two means ______.