A. I would recommend the light option. Although, she must follow the doctor's advice. It sounds like the doctor has given her a retinol-based cream and they thin the skin and clean out the pores, so she will go through a period of extreme skin sensitivity and skin peeling. The skin then renews itself without, hopefully, any of the acne there. This is normal, but if you are at all worried consult your doctor.
For comfort reasons, Liz Earle's Light Moisturiser will relieve the dryness. She must also avoid the sun when using the prescribed cream, because the sun can cause pigmentation when using retinol-based creams.