proud

I want to choose an area to work on for my dessertation for computer science. But due to time constraints I need to work in one of the below fields where I would not struggle to find my dataset. Which of these fields eases my task to find datasets: 1- Educational data mining e.g. Learning analytics for higher education 2- Mining data on social media e.g. (Twitter, Facebook) 3- social media content analysis. I would really appreciate your help, even if its a correction or suggestion.