How many times is the following code invoked by the call recursive(4)?
```
void recursive( int i )
{
using namespace std;
if (i < 8)
{
cout << i << " ";
recursive(i);
}
}
```
a) 2
b) 4
c) 8
d) 32
e) This is an infinite recursion.
e) This is an infinite recursion.
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