|Question 21Verbal

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Text
Physicist Walter Massey led numerous scientific organizations over his long career. His most prominent appointment came in 1990, when Massey was named director of the National Science Foundation. _______ Massey had served as the first president of the National Society of Black Physicists.
Which choice completes the text with the most logical transition?
In conclusion,
A
Previously,
B
Thus,
C
For example,
D