SAT Text Structure and Purpose Question

The Museum of Modern Art (MOMA) in New York City has an exhibition of video games that includes Yars' Revenge from 1982, which museum visitors can play on site, and SimCity 2000 from 1994, which visitors can see only in a video presentation. MOMA claims the video presentations are only for games that would be impractical to display in a playable form, but video games are an inherently interactive medium, a feature that is grossly absent in a video-only presentation. Which choice best describes the function of the underlined portion in the text as a whole?