Final Answer:
When standing upright and viewed from the side, a plumb line should go through all of the following:a) Earlobe; b) Shoulder; c) Hip joint. Option D: "All of the above" is the answer.
Step-by-step explanation:
A plumb line is a vertical reference line determined by the force of gravity. When assessing the alignment of the body, particularly in fields like ergonomics or biomechanics, a plumb line is used to ensure proper posture. In this context, the correct answer is option D, indicating that a plumb line should pass through the earlobe, shoulder, and hip joint when an individual is standing upright.
Proper alignment is crucial for minimizing strain on the body and maintaining a healthy posture. Checking alignment through the earlobe, shoulder, and hip joint helps in evaluating overall body posture from a side view.
Option D is the answer.