|Question 4Verbal

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Text
Although our knowledge of the Pliocene epoch and the lives of the hominids during this time was once ________, recent analyses of fossils like that of the individual known as KNM-KP 271, discovered in Kenya in 1963, have sharpened our picture of what a day in the life of KNM-KP 271 may have looked like.
Which choice completes the text with the most logical and precise word or phrase?
nebulous
A
intricate
B
unprecedented
C
concrete
D