To make your research as efficient as possible, you should:

A) keep careful records of sources.
B) use unrepresentative data.
C) avoid using the objective approach.
D) refrain from gathering more information than you will use.
E) restrict yourself to one source so that your report is consistent.

Keeping careful records of sources will allow for easy referencing and proper citation, making the research process more efficient and organized. Using unrepresentative data (B) or avoiding the objective approach (C) can lead to biased or unreliable results, while refraining from gathering more information than needed (D) may lead to incomplete or insufficient findings. Restricting oneself to one source (E) can limit the scope and credibility of the research.