This is what goes at the end of the introduction in a study:
Their hypotheses
So the correct answer is C and the complete sentence is:
At the end of the introduction, researchers state their hypotheses.
In the introduction of a study you should start with a general overview of the topic you are going to write about.
You could include information about how your research was done but always keeping it general.
Then, you can finish your introduction with the hypotheses of your study.
Check more information about introductions here https://brainly.com/question/549332
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