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According to the passage, which of the following reached the moo first?

• A、A pair of tortoises.
  
  

• B、American astronauts.
  
  

• C、Russian astronauts.
  
  

• D、Dogs and monkeys.
  
  

What do Teitel' s words in the last paragraph imply?

• A、The tortoises were fond of seeing Earthrise.
  
  

• B、The tortoises were not given due credit for their experience.
  
  

• C、The tortoises were not named after the Soviet spacecraft.
  
  

• D、The tortoises were famous all over the world.
  
  

56.(  )