Answer:
C). Summarize the text.
Step-by-step explanation:
As per the given sentence, the teacher is most likely asking the students to 'summarize the text' as he asks them to 'restate the central idea of the text.' Summarizing a text means primarily to 'briefly restate the key ideas discussed in the work' and remind the readers of the solution of the author's purpose at the end of the work. It is basically a condensed version of the main points of the essay or paper and hence, option C is the correct answer.