Complete the sentence about Eyjafjörður with the correct year: As they are not visible on the surface, when the Icelandic Coast Guard did not detect the vent chimneys, they declared the vents non-existent in ______.
Answer and explanation
Correct answer: B. 1987
As they are not visible on the surface, when the Icelandic Coast Guard did not detect the vent chimneys in 1987, it declared them non-existent.
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