निम्नलिखित में से कौन सा शैक्षणिक और अनुसंधान प्रकाशनों के लिए एक खोज मंच (search platform) है?

Which social media metric refers to the total number of unique users who see your content?

Consider the following statements: 1. MOOCs always ensure high completion rates due to open accessibility. 2. Cloud Computing eliminates the need for local data storage entirely. 3. Artificial Intelligence in education can enable adaptive learning systems. 4. Blockchain can be used for secure academic credential verification. Which of the above statements are correct?