There’s no right or wrong answer to this question, but it’s important to know how you should best respond while remaining as transparent as possible.
Take the time to explain the role each member within your current team and share what value they contributed to the overall goal. This shows that as a manager, you can clearly understand what function each role plays within the overall strategy.
As a side note, if you’re applying to become a digital marketing manager, I’d recommend taking the time to discuss experiences where you’ve taken leadership responsibilities in the past. You may have previously directed a campaign, or used your initiative to work across departments with other team members. These skills show that you have experience managing and driving initiatives on your own.