In Looking for Evidence for the Practice, the Order for Searching

In looking for evidence for the practice, the order for searching that is presented in this textbook is:

A) meta-analysis then systematic review of the literature
B) traditional literature review then meta-analysis
C) systematic review of the literature, meta-analysis, then traditional literature review
D) systematic review of the literature, meta-analysis, then traditional literature review and if all else fails to generate sufficient evidence for the researcher's purposes, the researcher can seek articles that report single studies that are of interest to the research question