The relative success of particular countries in attracting tourists depends on their ability to provide particular tourism ______.

A．better health and strength
B．increasing financial returns
C．a higher aim throughout his life
D．a broader view and a significant life

A．we should have a better understanding of the world
B．we should live an optimistic rather than pessimistic life
C．we can achieve learning by exploring subjects in this world
D．we can lead a meaningful life from the pleasure of learning