求解一道关于平行的语法题

亲爱的敌人

A recent study has found that within the past few years,many doctors.had elected early retirement rather than face the threats of lawsuits and the rising costs of malpractice insurance.

• Ahad elected early retirement rather than face  
• Bhad elected early retirement instead of facing  
• Chave elected retiring early instead of facing  
• Dhave elected to retire early rather than facing  
• Ehave elected to retire early rather than face  
  

答案选E。解释上说因为平行的内容是elect后面的内容平行。楼主选的A。为什么不能是elect和face平行呢？另外根据时态，在过去发现，那么过去的过去放生的事情不应该用过去完成时吗？哪位大神能解答一下啊！感激不尽

医生吃鱼

楼主似乎有点钻牛角尖了，看到rather than这种平行标志肯定首选平行的时态啊！
过去完成式和一般现在时怎么平行呢？

主句has found是现在时，那说明within the past few years的时间轴是从现在算起的过去几年内，后面用现在完成时能说通吧？

亲爱的敌人

确实钻牛角尖了，这样一说明白了，过去的事怎么和现在平行。谢谢！