Who Is Using ONLY Selection and Optimization to Help Memory

Who is using ONLY selection and optimization to help memory?

A) Jing, who focuses on what he needs to remember most, and takes special time to remember those facts
B) Kathy, who asks her husband to help her remember important items she needs
C) Lala, who uses a daily planner to remember her appointments
D) Dembe, who believes that his memory is so good that he will automatically recall everything