Read the following context and choose the best option to answer the question.
Context: They have literally TONS of castles all over the place . I had to have seen at least 10 just driving around . Coupled with the fact that tourism is very very small in Wales they do n't have visitor centers and charge you to see them . You just drive up and walk in .
Question: Why do they have so much of what they have ?
Options: 
A. None of the above choices .
B. The tourism love their place a great amount .
C. The castles must 've all been built in the past .
D. The huge amount of tourism must be there to see the castles .


C