【正确答案】
D
【答案解析】You can arrive at the correct answer by the process of elimination.
Statement I is supported by the passage. At the time Bennett and Logan wrote, both the pre-Mayflower period of black history and the nineteenth-century life of blacks in North Carolina were.relatively unexplored. There-fore, you can eliminate Choices B and E.
Statement II is unsupported by the passage. Bennett's work was a popularization intended for a wide general audience. It was not aimed at academics. Therefore, you can eliminate Choice C.
Statement III is supported by the passage. Bennett's work appeared first as a series of magazine articles, then as a book. Logan's work first appeared as a doctoral thesis, then (with revisions) as a book. Therefore, you can eliminate Choice A.
Only Choice D is left. It is the correct answer.