Identify the ONE grammatical error in the following sentence: "It is now clear that policymakers must knew about the economic benefits of methane monitoring, yet chose not to act."

Question

Accepted Answer

"Must knew" is incorrect; the correct past modal form is "must have known."

Answer

"Must knew" is correct when expressing strong certainty about a past fact.

Answer

There is no error; "must knew" is an acceptable informal variant of "must have known."

Answer

The error is in "chose not to act," which should be "had chosen not to act."

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Identify the ONE grammatical error in the following sentence: "It is now clear t...

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