Item — sat-dog

Medium Reading and Writing · Standard English Conventions · None · MCQ

The first time that the United States successfully launched a rocket into space was in 1958. That event, which some historians consider the start of the space race, was a major turning point in human history.

Which choice best combines the sentences at the underlined portion so that it conforms to the conventions of Standard English?

A
That event, some historians consider the start of the space race, was a major turning point in human history.
B
That event, which some historians consider the start of the space race, was a major turning point in human history.
C
That event some historians consider the start of the space race, was a major turning point in human history.
D
That event, some historians consider the start of the space race, was a major turning point in human history.

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