Answer:
B. central ideas and supporting details
Explanation:
A summary is basically a recounting of the major points of the article or passage.
It's very objective, which means that it shouldn't include your opinion in it, eliminating A.
The summary is also about the article or passage itself; it shouldn't include information about the author's background. Eliminate C.
Since a summary takes into account just the general main idea of the passage, it shouldn't include all the tiny details that only provide extra descriptors. Eliminate D
Thus, the answer is B.
Hope this helps!
