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Verbal·Standard English Conventions·Boundaries

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The programming languages COBOL, developed by Grace Hopper in        developed by Evan Czaplicki in 2012, are all routinely translated into executable code by tools known as compilers.

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

A

1959; Harbour, developed by Antonio Linares in 1999; and Elm,

B

1959, Harbour developed by Antonio Linares in 1999; and Elm

C

1959; Harbour, developed by Antonio Linares in 1999, and Elm,

D

1959, Harbour; developed by Antonio Linares in 1999; and Elm,