A here for sure for the correct use of participle (this was discussed before several times)
check this out... you will learn a lot from this discussion http://www.gmatclub.com/phpbb/viewtopic ... c&start=20
The explanantion is brilliant.
I still have a question though. Paul mentioned about split restrictive clause
Is it the intruding prepositional phrase he was talking about? Please see the text in green?
demonstrating that with sound design and maintenance
, wooden buildings can last indefinitely