请教一道白勇的语法，我认为两个选项都对呀？

10. Senator Lasker has proposed legislation requiring that employers should retain all older workers indefinitely or show just cause for dismissal.

A. that employers should retain all older workers

B.that all older workers be retained by employers

C.the retaining by employers of all older workers

D.employers' retention of all older workers

E.employers to retain all older workers

请问这道SC到底该选A还是E啊
A是SHOULD+动词原型，按理说是虚拟语气是对的啊

我觉得应该选E吧,因为这个requiring是修饰legislation的,应该用虚拟语气的,所以should要省略.

E里面的require sb to do 是正确的用法,我觉得是E吧,正确答案是什么呢

是E，OG11的原题，楼上说得对， should一定要省略