To summarize the central idea in a text, readers should identify the topic and then identify a. little-known facts about the topic. b. the author's opinion about the topic. c. other readers' opinions about the topic. d. scientific facts about the topic.

The correct answer is B. The author's opinion

Explanation:

The central idea in a text refers to the dominant or general idea of the text that summarizes all the content of it. This idea is usually expressed by the main idea of each paragraph that tells the reader what the text is about or the topic of it. However, besides knowing the general topic of a text, to really understand the central idea it is required to know the author's opinion about it or how the author addresses the topic, this allows you to know what is the position of the author towards the topic of the text and therefore what is the purpose of the text itself (inform, persuade, explain, analyze) which is required to summarize what the text is about this can be identified by analyzing the text structure and the election of words and information provided by the author about the topic. Thus, to summarize the central idea of a text the reader will need to identify the topic and know the author's opinion about it.

idk

explanation:

im dum j.e

- "the basic difference between keywords and subjects is that subjects (or "subject headings") have been predetermined, while keywords have not. a keyword is an easy place to start because you can use any word that seems to fit your search; this is called "natural language" searching."