Final answer:
The article suggests that people who seem to have everything might have problems that others can't see.
Step-by-step explanation:
The correct option is D) People who seem to have everything might have problems that others can't see. The article mentions that Meghan Markle, despite her privileged position as a member of the British royal family, faced unceasing negative media attention, invasion of privacy, and racially abusive comments. This indicates that people who appear to have everything on the surface can still experience unseen problems and struggle with mental health issues.