The Alumni Relations office wants to respond to posts by alumni on variety of Channels,...

Social Studio is a solution that the Alumni Relations office can consider to respond to posts by alumni on a variety of channels, including Instagram, Twitter, and Facebook. Social Studio allows the office to monitor, publish, and engage with social media content from different platforms. Social Studio also provides analytics and insights that can help the office measurethe effectiveness of their social media strategy. Email Studio, Audience Studio, and Interaction Studio are not solutions that can respond to posts by alumni on a variety of channels. References:

https://www.salesforce.com/products/marketing-cloud/social-media-marketing/

https://trailhead.salesforce.com/en/content/learn/modules/social_studio_basics