As part of his effort to identify Bronze Age pathways across Sicily, archaeologist Dario Calderone created three-dimensional digital models of the terrain via aerial photogrammetry. The drone the landscape, which included archaeological sites from as far back as the Early Neolithic Period, flew in a pattern that ensured 60 percent forward overlap and 20 percent side overlap between individual images.
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Verbal·Standard English Conventions·Form, Structure, and Sense
mediumWhich choice completes the text so that it conforms to the conventions of Standard English?
A
photographs
B
photographing
C
was photographing
D
photographed