Which statements are true about a literature review? The literature re

Which statements are true about a literature review? The literature review:

a. cannot include any articles written more than 5 years ago.
b. generates a picture of what is known and not known about a particular problem.
c. includes an exhaustive review of all information on the subject.
d. indicates whether adequate knowledge exists to make changes in practice; provides guidelines for analysis of the data for the developing study.

ESSAYBID ANSWER

ANS: B
Literature reviews provide a picture or describe what is known and not known, or also stated as gaps in the knowledge of the subject or phenomenon under study.
Studies considered classic in a field are often included, even if they are more than 5 years old.
Literature reviews present only relevant studies from credible sources.
The research question drives the researcher in developing the study, including determining the type of analysis that will be used.