Which sentence uses modal verbs to make the STRONGEST logical deduction about the past?

Question

Answer

Oil company executives could have been aware of the economic benefits of fixing methane leaks.

Answer

Oil company executives should have been aware of the economic benefits of fixing methane leaks.

Answer

Oil company executives might have been aware of the economic benefits of fixing methane leaks.

Answer

Oil company executives must have been aware of the economic benefits of fixing methane leaks.

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