GMAT Sentence Correction (SC) | Re: In the initial planning stages, the condominium corporation

In the initial planning stages,the condominium corporation took into account only the concerns of its prospective clients , not those of surrounding homeowners.

(A)the condominium corporation took into account only the concerns of its prospective clients
(B) the condominiumcorporation has only taken into account the concerns of their prospective clients
(C) the condominium corporationonly took their prospective clients’ concerns into account
(D) the concerns of its prospective clientsonly were taken