请大神赐教啊！！！好人一切顺利！关于逻辑主语

Rona228

Pioneered by scientists at Los Alamos National Laboratory, BEAM robots are not programmed to walk; instead they use brainlike circuits called neural networks to learn to walk through trial and error.

• ABEAM robots are not programmed to walk; instead they use brainlike circuits called neural networks to learn to walk through trial and error  
• BBEAM robots learn to walk through trial and error by using brainlike circuits called neural networks instead of by programming them  
• CBEAM robots are not being programmed to walk but instead using brainlike circuits called neural networks and learning to walk through trial and error  
• Dbrainlike circuits called neural networks are used instead of programming for BEAM robots learning to walk through trial and error  
• Ebrainlike circuits called neural networks are being used for BEAM robots that learn to walk through trial and error instead of being programmed  
• 我就想问下答案说DE不对的原因是因为 Pioneered的逻辑主语应该是BEAM robots，为什么不可以是 scientists？要怎么分辨呢？
  

kiwifoodtown

LZ,请先弄清一个问题：什么是逻辑主语？然后再搞明白：这里Pioneered作什么成分？哪个是主句？这句的前后关系是怎样的，相信搞懂了这些问题后，你的问题就不是问题了。