An example of a TreeView is:

What would be displayed after line 6 runs?

``` 1 vector vNums; 2 vNums.push_back(10); 3 vNums.push_back(5); 4 vNums.push_back(15); 5 vNums.push_back(25); 6 cout << vNums.size(); 7 vNums.pop_back(); 8 cout << vNums.at(2); 9 vNums.pop_back(); 10 vNums.pop_back(); 11 vNums.pop_back();``` A. 0 B. true C. 4 D. 3

Which of the following terms is a collection of computers and users that are identified by a common security database?

A. workgroup B. controller C. segment D. domain