According to your answer, it is not clear what you have done the most to handle stress in that situation. The interviewer asks this question keeping in mind some of the key points regarding every candidate. They are interviewing many people for that particular position. Employers want to know you will handle it constructively with a good attitude to maintain good company culture.
So you can answer with an example like, " Communication is key for me in a stressful situation. For example, I was working on a project with other team members and we found there was a duplicate work being done. By scheduling a weekly meeting and keeping an honest answer with our team members, we took forward the project and ended up contributing to a significant company goal in a big way".