Compared with dreamless sleep, deep dream sleep is

• A、not the result of natural selection
  
  

• B、less likely to appear to monkeys
  
  

• C、more protective to the animals
  
  

• D、at a higher stage of evolution
  
  

It can be inferred from the passage that animals that are prey rarely experience dream sleep because they

• A、have evolved further than predators
  
  

• B、are particularly intelligent animals
  
  

• C、need less sleep than predators
  
  

• D、would be caught if deeply asleep
  
  

自信的價值不言而喻，在我們面臨一個個挑戰時，正是因為擁有了自信，我們才擁有了最終的成功：請以The Value of Self-confidence為題寫一篇能夠體現自信價值的，150詞左右的英語短文。