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Verbal·Standard English Conventions·Form, Structure, and Sense

hard

A 1932 report by celebrated US track coach Lawson Robertson        that the limits of human physiology ruled out a mile time under 4:01.6 was disproved by Roger Bannister’s sub-four-minute mile in 1954—not to mention the fact that more than 2,000 runners have since matched Bannister’s feat.

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

A

asserted

B

had asserted

C

asserts

D

asserting