Which AI system will continue to analyze a problem until it finds the best solution?

A CD does not work in a computer. What is the first thing you should try in this situation?

A) Replace the optical drive. B) Replace the cable. C) Use the DirectX diagnostics tool. D) Try the disc in another machine or try another CD in this computer. E) Use the Windows Games and Multimedia Troubleshooter link.

When you code a union with the INTERSECT keyword to combine two result sets, the union

A. excludes rows from the second result set if they also occur in the first result set B. includes all rows that occur in both result sets if the primary keys are the same C. includes only rows that occur in both result sets D. excludes rows from the first result set if they also occur in the second result set