GMAT Critical Reasoning (CR) | Re: A work of architecture, if it is to be both inviting and

I didnt understand the explanation for B.

The passage says that if it is both inviting and functional then it is unobtrusive and the last line states that modern architects produce buildings that are not functional for public use (no where it states that the buildings are inviting/not inviting)

So how can we infer that.....Modern architects who let their strong personalities take over their work produce buildings that arenot unobtrusive. (the passage only says that they are not functional, it
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