What impedes DDR and why or how?

What impedes DDR and why or how?

Order Description

 

The paper supposed to be 2 page answer to this question : What impedes DDR and why or how?

Since it is a group work, my friend had done the first page (which includes the answer for “WHAT”) and I supposed to do the second part (which should answer “WHY or
HOW”

 

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