The Eiffel Tower ______ originally intended as a temporary structure for the 1889 World's Fair ______ has since become one of the most recognized landmarks on the planet.
Which choice completes the text so that it conforms to the conventions of Standard English?
- A
—,
- B
( )
- Ccheck_circle
—, —
- D
, —
Explanation
A pair of em-dashes properly sets off a nonessential parenthetical for emphasis. Mismatched punctuation is ungrammatical.