A contractor discovers buried fuel tanks not shown on the contract drawings during excavation. This situation is best described as:
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A
A force majeure event entitling the contractor to a no-cost time extension only
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B
A Type II differing site condition where actual conditions differ materially from those ordinarily encountered
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C
A design error for which the architect bears full liability
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D
An unforeseen condition not covered under the contract, precluding any recovery