Final answer:
The quadratus lumborum muscle is located posterior and lateral to the kidney, which is the correct answer to the question.
Step-by-step explanation:
The question you asked pertains to the anatomy surrounding the kidneys. When considering what can be found posterior and lateral to the kidney, we must focus on the muscles that form the posterior abdominal wall. The rectus abdominis is an anterior muscle, and both the psoas and iliacus are not situated laterally to the kidney. However, the quadratus lumborum muscle is indeed positioned posteriorly and laterally to the kidneys, as it is a part of the posterior abdominal wall that contributes to stabilization and posture. Therefore, the correct option is c. quadratus lumborum.
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