单选题：阅读下列短文,回答题目.In July l994 Jupiter，the largest planet in our s

阅读下列短文,回答题目.
In July l994 Jupiter，the largest planet in our solar system，was struck by 21 pieces of a comet(彗星).When the fragments(碎片)landed in the southernpart of the giant planet，the explosions were watched by scientists here on earth。But what if our own planet was hit by a comet?
The year is 2094.It has been announced that a comet is heading towards the Earth.Most of itwill miss our planet，but two fragments will probably hit the southern part of the Earth.The newshas caused panic.
On 17 July，a fragment four kilometres wide enters the Earth’s atmosphere with a huge explosion.About half of the fragment is destroyed.‘But the major part survives and hits the South Atlantic at 200 times the speed of sound.The sea boils and all enormous wave is created and spreads.
The wall of water rushes towards southern Africa at 800 kilometres a、n hour.Cities on the Africancoast are totally destroved and millions of people are drowned.The wave moves into the IndianOcean and heads towards Asia.
Millions of people are akeady dead in the southern part of the Earth.but the north won’t escape for long.Tons of broken pieces are thrown into the atmosphere by the explosions.As the sunis hidden by clouds of dust，temperatures around the world fall to almost zero.Crops are mined.Wars break out as countries fight for food.A year later civilization.has collapsed.No more than 10million people have survived.
Could it really happen?In fact，it has akeady happened more than once in the history of theEarth.The dinosaurs(恐龙)were on the Earth for over 160 million years.Then 65 million yearsago they suddenly disappeared.Many scientists believe that the Earth was hit by a space fragment.
The dinosaurs couldn’t survive in the cold climate that followed and they became extinct.Will wemeet the same end?
Which of the following is NOT TRUE according to the author’s description of the disasterin 2094? A．The whole world becomes extremely cold.
B．All the coastal cities in Africa are destroyed.
C．The whole mankind becomes extinct.
D．The visit of the comet results in wars.