Choose the version of the sentence that has correct and consistent verb tense

Choose the version of the sentence that has correct and consistent verb tense.

• Edward knows his days were numbered at his factory job because new owners had announced a reduction in employees.
• Edward knew his days are numbered at his factory job because new owners have announced a reduction in employees.
• Edward knew his days were numbered at his factory job because new owners are announcing a reduction in employees.
• Edward knows his days are numbered at his factory job because new owners have announced a reduction in employees.