Considering the situation, the theoretical approach that most closely aligns with Sarah's ideas is "Postmodern theory."
Postmodern theory is the theory that deals with the philosophy of sociocultural context having multiple perspectives.
The postmodern theory concerns broad skepticism, subjectivism, relativism about sociopolitical and economic power.
Thus given that Sarah approaches her research with the idea that there are no absolutes and that social reality is multifaceted and always changing this is similar to Postmodern theory.
Hence, in this case, it is concluded that the correct answer is "Postmodern theory."
Learn more about Postmodern theory here: https://brainly.com/question/10871360