The author's attitude toward the future use of computer is ______.

A．playing chess shows computer's program has been developed into a new stage
B．it is practically possible now that computer can win every chess game now
C．computers even with less than complete data can be programmed to defeat the world champion chess player______.
D．computers can be programmed to play and reason but not learn

A．Animals developed different strategies to survive.
B．Large animals can take strategies to reduce the effect of extreme heat.
C．Animals can tolerate the loss of body water.
D．A very dehydrated person can drink enough water to rehydrate.