What tool should you use to determine which of your institution's social media posts are getting the most engagement,and at what day and time?

A) research
B) surveys
C) analytics
D) Twitter

Analytics tools are specifically designed to track and analyze engagement on social media platforms. They can provide insight into which posts are getting the most engagement, at what time of day, and on what days of the week. This information can then be used to optimize future social media content and posting schedules to maximize reach and engagement. Research can be helpful as well, but may not provide as specific or detailed information as analytics. Surveys and Twitter are not relevant options for this particular task.