All of the following statements are true about the architecture of Hoi An EXCEPT that

• A. 
  the houses along the street are decorated with bushes of bougainvillea flower
• B. 
  the houses along with the street are lovely sights and very photogenic
• C. 
  the layout of houses are for benefit of better ventilation in tropical region
• D. 
  the layout of houses are unique and strictly complied with Feng Shui