Which evidence in the passage best supports the inference that there is mystery behind the design of the Leaning Tower?

Match the term to the purpose it has. 1. but 2. furthermore 3. meanwhile 4. in the distance 5. first 6. therefore 7. in other words 8. for instance a. show space relation b. introduce an illustration c. repetition of an idea d. take away, limit, or oppose e. show a consequence f. indicate order g. show time relation h. add ideas