Final answer:
The most appropriate greeting by the medical assistant is 'Nice to see you, Mrs. Anderson,' which acknowledges the patient with respect and professionalism.
Step-by-step explanation:
The correct way for the medical assistant to greet Mrs. Anderson and her daughter Katherine upon their arrival at the doctor's appointment would be choice d: Nice to see you, Mrs. Anderson. This greeting directly acknowledges Mrs. Anderson with respect and professionalism, by using her name and offering a polite statement of recognition. It's essential that healthcare professionals communicate with both the patient and their accompanying family members in a manner that is respectful and affirms the dignity of the patient. Options a, b, and c are less appropriate because they either address only Katherine, use an overly informal term like 'sweetie,' or fail to acknowledge Mrs. Anderson directly.