00:00

Question 29·200 Super-Hard SAT Reading Questions·Craft and Structure

Architectural historians have often interpreted the narrow courtyards of several nineteenth-century coastal hospitals as features intended to improve ward ventilation. Recently cataloged expense ledgers show, however, that the hospitals with the narrowest courtyards also purchased the most mechanical fans. Some scholars have taken this association to refute the ventilation interpretation. That conclusion treats a feature intended to assist ventilation as though it must have been intended to make mechanical assistance unnecessary. In architects’ correspondence, courtyards are described as one of several means of improving air exchange, and later notes recommend fans for wards that remained stuffy.

Which choice best describes the function of the underlined sentence in the text as a whole?