Find the mistake in the following C code:

Question

What can be said about the following code?
```c
int main() 
{
    unsigned char speed = -1;
    printf("The car has a speed of %d km/h", speed);
    return 0;
}
```

Accepted Answer

The value of `speed` is replaced by `255`.

Answer

The variable `speed` can contain values from `-128` to `127`.

Answer

The variable `speed` can contain values from `0` to `256`.

Answer

The variable `speed` is cast to `signed char`.

Question from the Language C - Fundamentals test

Find the mistake in the following C code: