GMAT Sentence Correction (SC) | Re: Senator Lasker has proposed legislation requiring that

(A) that employers should retain all older workers
correct
(B) that all older workers be retained by employers
show just cause for dismissal - employers need to show....this option is not quite clear if its workers or employers
(C) the retaining by employers of all older workers
awkward
(D) employers’ retention of all older workers
change in menaning
(E) employers to retain all older workers
proposed - should is missing....

Can someone explain why A is wrong & that my reasons are correct
...

---