A)  Create a new view and apply an advanced lifter that deletes page data outside the subdirectory

B) Create a duplicate view and add a Filter: select “Include only traffic to a subdirectory” from the Fifter Type drop down, and specify the subdirectory 

C) Create a new web property and add the new tracking code to the pages on the subdirectory

D) Create a second Google Analytics account, and apply the new tracking code to the pages in the subdirectory