Upon revisiting his initial ideas, a researcher determines that the evidence supports a different perspective. What should he do next? Check all that apply.
move ahead by creating an outline of his research assignment
consider whether he ought to go back to find more evidence
think about whether he needs to change his perspective
begin writing a well-supported argument
continue to develop his argument despite the evidence
Save and Exit
Next
Submit

He should, Consider whether he ought to go back to find more evidence AND think about whether he needs to change his perspective!

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in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation: