In port/partly because/partly to

Hi,

Please look at the following sentence.Only one of the 5 options is correct.I can not understand which is correct and why the rest are incorrect.I am able to understand that C is incorrect.Please explain and help.

In recent years cattle breeders have increasingly used crossbreeding, in part that their steers should acquire certain characteristics and partly because crossbreeding is said to provide hybrid vigor.

(A) in part that their steers should acquire certain characteristics

(B) in part for the acquisition of certain characteristics in their steers

(C) partly because of their steers acquiring certain characteristics

(D) partly because certain characteristics should be acquired by their steers

(E) partly to acquire certain characteristics in their steers

Thanks for your reply Mister Micawber. But I am still confused. I dont feel there is much difference between B and E. Option B is "for the acquisition of sth" which is the gerund form. Option E is "to acquire sth" which is the infinitive form. They are just 2 different ways of saying the same thing.Please correct me where I am wrong.I can not understand what is wrong with option D either. Please explain.

I have still not understood.There is only one subject in the sentence "Cattle breeders have used cross breeding .. " and that is "Cattle breeders". So there is no confusion about what is the subject.

Now I understood your point and agree that B is the correct option. But the correct option is E ( mentioned at the place from where I saw this sentence). So I am confused again. Any other opinions/ideas ?