|Question 19Verbal

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The Nimatron was an early digital computer designed to play a mathematical game against visitors to the 1939-1940 New York World's Fair. Though capable of making game moves in milliseconds, this one-ton machine-built by Westinghouse Electric Corporation engineers to demonstrate how electrical relays could respond to players' choices according to predetermined mathematical patterns ______ programmed with time delays to give the impression of deliberative thinking.
Which choice completes the text so that it conforms to the conventions of Standard English?
was
A
being
B
were
C
are
D