The passage tells us that the trend of food obsession is ______.

A．A person who is always seeking will never be content.
B．We care about the place where we live.
C．The grass is always greener on the other side of the fence.
D．It is sometimes better to appreciate the advantages we already have than constantly seeking more.

A．A parent.
B．A teacher.
C．A report.
D．A writer.