Question

in a 2022 conference at the kessler center in philadelphia, conservators compared three techniques—wet cleaning, solvent gelling, and low - pressure suction—for stabilizing early color posters. the pigment maps ___ from a 1911 orpheus electric advertising print not only reveal blue underlayers beneath the reds but also explain why the team rejected a widely circulated 1930s reprint.
19 which choice completes the text so that it conforms to the conventions of standard english?
a extracted
b were extracted
c had extracted
d extracting

Explanation:

We need to choose the correct verb form to complete the sentence. The subject "the pigment maps" and the verb "extract" have a passive relationship (the maps were extracted), but in the context of the sentence, we need a past - participle as an adjective - like modifier. Option A "extracted" is a past - participle that can function as an adjective to modify "the pigment maps", showing that the maps were extracted. Option B "were extracted" would make the sentence have two main verbs (were extracted and reveal) without proper coordination. Option C "had extracted" is in the past perfect and is incorrect as the maps can't perform the action of extracting. Option D "extracting" is a present - participle and doesn't fit the passive relationship here.

Answer:

A. extracted