The lower the response rate, the a. less likely it is that response error will affect research results. b. more likely it is that response error will affect research results. c. more likely it is that nonresponse error will affect research results. d. more likely it is that noncoverage error will affect research results.

Option- D

The lower the response rate, the more likely it is that non-coverage error will affect research results. As, due to places or topics left uncovered it will results in having lack of data for the completion of projects and making it very unlikely for the whole system to move along the same procedure or mechanism as set by the company or the related firm.  While, to get the required results in a more optimum level, as there are different forms and levels of research work that is carried for the acquiring more effective and feasible results as according to the objectives or goals set by the firm or the company.

Sector is best defined as (part).