Answer:
B
Step-by-step explanation:
You can rule our A automatically, it says that they used New Zealand so it obviously could be a place on earth.
Next you can rule out C because it said they had to find "Amazing countryside" so it wasn't very common
Lastly we can also rule out D because Tolkien's stories were not written to take lace in New Zealand, they were written to take place in their own world.
Which leaves us with B, which is a rational answer