题目内容：
Scientists ignored Lake Vida because they thought that a lake of ice _____.
A．might have come from Mars B．may be older than that collected below 39 feet of ice
C．is found to be a great deal higher than that of seawater
D．may return to life sooner than microbes frozen in the surface ice
E．was of little scientific value
F．is to collect some briny lake water for analysis
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