Looking at your resume, you've had a number of job changes, what would make me think that you will stay with EHL AG?

Most hiring managers will consider more than two jobs in the past five years to be frequent movement. Take some time to explain your career progression to the interviewer. Be sure to avoid speaking poorly of any of your previous employers. This question is not the time to ramble on about how your former company did you wrong. The only appropriate answer is a short and sweet one.