Nhận biết (M1)

Now seen as a mechanical precursor to the e-reader, Spanish educator and inventor Angela Ruiz Robles’s Enciclopedia Mecanica eschewed pages in favor of three horizontal paper scrolls that could be easily swapped out to accommodate a range of subjects. Though Ruiz Robles’s prototype had limited functionality, interactive features described in her 1949 patent --- such as a button labeled “verb” that would illuminate relevant text when pressed --- __________ an impressive early vision of hypertext.

Which choice completes the text so that it conforms to the conventions of Standard English?

• A.

  revealing

• B.

  has revealed

• C.

  reveals

• D.

  reveal