I choose topic C--what is important when aiming to attract new staff. As for this topic, there are three points to mention here.
In the first place, in attracting new staff, what counts is the reputation of the company. Whether the agency is reliable and offers high-quality service are
essential for the success of attracting new staff. So the reputation is an important temptation that the new staff can not resist.
Besides,  competitive  wages  is  also  very important.  High wages on the same position can arouse the job hunters' attention. The candidates will tend to choose the higher one for the same task.
Last but not least, future development is always something preferable. The new stuff may want to find a company where they can develop their ability and enrich themselves for a better future.
To sum up, reputation, competitive wages and future development are all important elements when aiming to attract new staff.