Maggie is a journalist in Los Angeles. Her friend Joan in New York tells her there is an opening at a widely circulated magazine. The office is in New York. Maggie applies, interviews, and is invited to join the magazine staff on a probationary basis for six months. Maggie quits her job, sells her condo, and relocates to New York to take this opportunity. After three months, the magazine is purchased by a global media company, and Maggie's job is eliminated. Maggie is out of work. On which legal concept (theory) might Maggie sue to recover her losses ? Explain.