+1 for option C.
Ask yourself - If a large % suffer bankruptcy during a typical 5 yr period then can we attribute the cause of bankruptcy to the opening of a store ?
B is wrong because we are not concerned with the current % but with how the % changes.
Ask yourself - If a large % suffer bankruptcy during a typical 5 yr period then can we attribute the cause of bankruptcy to the opening of a store ?
B is wrong because we are not concerned with the current % but with how the % changes.
