Which of the following are correct declarations of iterators for STL containers? You may assume that the proper header has been included and that a using directive makes the names from namespace std available.

a) ```
vector::iterator vecIterator;
```
b) ```
list::iterator listIterator;
```
c) ```
deque::iterator dequeIterator;
```
d) ```
list::iterator listIterator;
```

a) ```
vector::iterator vecIterator;
```
c) ```
deque::iterator dequeIterator;
```
e) ```
list::iterator listIterator;
```