The author thinks that the conclusions of any research about people's state of mind are ______.

A．Sleep at the campground.
B．Play a card game in their car.
C．Return home after the rain stopped.
D．Stay at a hotel at the foot the mountain.

A．Anxiety, though unavoidable, can be coped with.
B．Children's anxiety has been enormously exaggerated.
C．Children's anxiety can be eliminated with more parental care.
D．Anxiety, if properly controlled, may help children become mature.