D is wrong because the while "A work of architecture that takes second place to the environment " is a necessary condition, it is not a sufficient condition for a functional building. One of the stickys on CRs on the verbal section detailed the difference between necessary and sufficient clearly.
A work of architecture, if it is to be both inviting and functional for public use, must be unobtrusive, taking second place to the total environment. Modern architects, plagued by egoism, have violated this precept. They have let their strong personalities take over their work, producing buildings that are not functional for public use.
Which one of the statements below follows logically from the statements in the passage?
(A) Unobtrusive architecture is both inviting and functional.
(B) Modern architects who let their strong personalities take over their work produce buildings that are not unobtrusive.
(C) An architect with a strong personality cannot produce buildings that functional well for the public.
(D) A work of architecture that takes second place to the environment functions well for public use.
(E) A work of architecture cannot simultaneously express its architectâ€™s personality and be functional for public use.
I chose D but OA is B...Please explain?