Answer :
After the exam, giving the students a survey questioning their study habits and what grade they made on their exam will be an ideal way to test hypothesis. Therefore, the option D holds true.
A hypothesis can be referred to or considered as the study or experiment carried on a particular topic or a subject related to the detailed analysis or presentation of a theory. Moreover, tools such as surveys and questionnaires are extensively used for the purpose of conducting a hypothesis and interpreting the results related thereto.
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