Summary by @tldr:

One of her keywords for her strengths was "communication." She knew immediately upon hearing this question that "communication" could be woven into the answer, and she responded, confidently: "I find that communication can solve all conflicts in the workplace.
By knowing the keywords related to her strengths and weaknesses, she can focus on the real red meat in her interview answers: her experience.
The dream company realizes that they have met with a problem-solver, and Mary leaves the interview feeling confidence and peace of mind knowing that she gave a stellar performance.
I was a recruiter for 7 years and can give more advice articles on this subject if it is desired... just upvote this post and leave a comment with areas that you would like to see written about.