Form 18 - Q10

[puresillylily]

Many savings and loan institutions are suffering because they are forced to pay at least 10 % or more interest to attract deposits and carry many mortgages not earning 9 percent.
(B) or more interest to attract deposits but carry many mortgages that earn less than
(C) interest to attract deposits while carrying many mortgages that earn less than
(D) interest for attracting deposits while carrying many mortgages not earning
(E) interest for attracting deposits but carry many mortgages that earn less than

Answer: C

I need help - why B doesn't work?

Thank you!!

[hwatai]

at least + or more = redundency ......(A)(B)錯了
在句意上，一定要less than 9%才合情合理......(A)(D)錯了
表示目的，以to v 為首選，不要用for ving(表用途)......(D)(E)錯了