Explanation: The best way for the designer to help mitigate pushback from developers is to work together on setting up UX Indicators. UX Indicators are a set of metrics that measure the user experience of a product or feature, such as usability, satisfaction, engagement, and adoption1. By working together on setting up UX Indicators, the designer and the developers can align on the goals and expectations of the design changes, and use data and evidence to evaluate their impact. This can help to reduce the subjective opinions and assumptions that might cause pushback, and foster a collaborative and user centered culture. Sharing research notes from previous projects with them (A) might not be very helpful, as the research might not be relevant or applicable to the current project, and the developers might not trust or understand the research methods or findings. Getting buy-in from the development lead first and let them persuade others (B) might not be very effective, as it might create a top-down or hierarchical approach that does not involve the developers in the design process, and might make them feel excluded or ignored.