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Question 87·200 Super-Hard SAT Reading Questions·Craft and Structure

Astronomer Henrietta Leavitt established a relationship between the luminosity and period of Cepheid variables, transforming them into cosmic distance markers. Edwin Hubble later exploited this "standard candle" to gauge the size of the universe, but he was ______ in attributing sole credit to Leavitt, ignoring the astronomers whose subsequent calibrations made his own measurements possible.

Which choice completes the text with the most logical and precise word or phrase?