Why Would a Company Hire an Outside Research Consultant Instead

Why would a company hire an outside research consultant instead of conducting the research in-house?

A) An outside research consultant may have special expertise or capabilities.
B) An outside research consultant can usually do the research for less money than it would cost to do it in-house.
C) Employees may be better able to follow up on a research project conducted by an outside research consultant.
D) Generally, an outside research consultant can provide information more quickly.
E) all of the above