B is a correct answer but I have no idea why C is not a correct one. Please explain it for me. Thank you!
n Question: Unless this biodiversity were maintained, marine life would be at stake. This is ungrammatical and skewed. There is no call for the subjunctive, and conditionality is implicit in "unless".
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Minh Anh Nguy?n Question: Unless this biodiversity were maintained, marine life would be at stake.
This is ungrammatical and skewed. There is no call for the subjunctive, and conditionality is implicit in "unless". Also, "at stake" requires a gamble. They meant "at risk". It should be "Unless this biodiversity is maintained, marine life will be at risk."
Minh Anh Nguy?nB is a correct answer
They are testing to see if you know the simple formula
unless = if ... not.
CJ