Elaine has most likely conducted literature review.
Answer: Option B
Explanation:
The literature review contains a review of books, scientific articles and other sources related to a particular topic, research area or theory, as well as a description, summary and critical findings of this work in relation to the researched problem.
The term 'literature review' refers to the paper document that contains all findings and contributions of methods on a particular idea. So, to the given situation, this term is a suitable one as she involves drawing conclusions of her findings.
Meta-analysis refers to a quantitative, formalized epidemiological project that systematically assesses the outcomes of previous studies to draw conclusions from the entire study. The term 'conceptual-analysis' refers to verifying the selected concept and examine its presence. So, these would not be suitable for the given situation.