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


C

Computer Science & Information Technology

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