Finding dataset for Computer Science project?

[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.