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What data type should you use?

You manage a database named Exams accessed via a website. The website is regularly accessed by
users in different countries. You are redesigning a table named History that records when users have
purchased and taken online exams. You need one of the columns in the History table to record what
time of day that a user has taken an exam. Additionally, you need this column to have time zone
awareness. What data type should you use?