Mrs. Bedsore, an 80 year old female in a long-term care facility, develops a pressure ulcer on her sacrum that doesn’t seem to be healing. Which of the following BEST describes potential nutritional causes of her poor wound healing? calcium and vitamin C deficiencies, and lack of physical activity zinc and vitamin D deficiencies, and IBS (Irritable Bowel Syndrome) PEM (Protein Energy Malnutrition), zinc and vitamin C deficiencies PEM (Protein Energy Malnutrition, vitamin K and vitamin A deficiencies