To determine which Christian areas were outside of the Roman Empire in 476, we can evaluate each option based on historical context.
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Alexandria, near the Mediterranean Sea: Alexandria was part of the Roman Empire at this time.
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The island of Sardina, in the Mediterranean Sea: Sardinia was also under Roman control in 476.
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East of Asia Minor: This area included regions that were outside the Roman Empire, specifically parts of Persia and other eastern territories.
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Germany: Much of what is now Germany was outside the Roman Empire by 476, as the area was largely inhabited by various Germanic tribes.
Based on this analysis, the responses that indicate regions outside of the Roman Empire in 476 would most likely be East of Asia Minor and Germany. If only one response is required, then Germany would be the most straightforward choice as it is explicitly recognized as outside of Roman control.