Final answer:
The correct position used when making a bed with a person in it is the Semi-Fowler's position, where the person lies on their back with the head of the bed elevated to improve comfort.
Step-by-step explanation:
When making a bed with a person in it, the position that is used is typically the Semi-Fowler's position (B). In the Semi-Fowler's position, the person is positioned on their back (which is the supine orientation) with the head of the bed raised to about 30-45 degrees. This is commonly used in healthcare settings to increase comfort, improve breathing, and facilitate certain types of care for the patient. The Reverse Trendelenburg's position is not typically used for bed making as it involves having the bed flat with the whole bedframe tilted so the person's head is higher than their feet, which is less stable for this activity. The lateral or side-lying position (C) could be used if the patient requires being turned, but it is not the primary choice for simply making the bed.