Naming rules and acidity of Cl2CHCH2COOH How do we name $\ce{Cl2CHCH2COOH}$ ?

Is seeing branched chain our number 1 priority so we name it

1,1-dichloro-3-propanoic acid?

also 

Which is more acidic $\ce{Cl2CHCOOH}$ or $\ce{Cl2CHCH2COOH}$ ? 
I feel it should be the first one as there is more −I effect but not sure.
1- 3,3-dichloropropanoic acid. Please see http://www.masterorganicchemistry.com/2011/02/14/table-of-functional-group-priorities-for-nomenclature/

2- The first one  is more acidic, as the inductive effect, due to chlorine atom decrease fast with the distance. (So, your answer is correct!).