|Question 1Verbal

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Text
In a 2020 experiment, Kai Ruggeri and his team presented participants from Spain, Slovenia, and seventeen other countries with questions that were _____ those used in a groundbreaking 1979 study. By using the same questions that the earlier study did, Ruggeri and his team attempted to reproduce that study's findings.
Which choice completes the text with the most logical and precise word or phrase?
identical to
A
unavailable to
B
less entertaining than
C
more difficult than
D