Why did General Grant adopt the total war strategy?

to bring the war to a speedy end

to prove that he was worthy of the job

to seek revenge against General Lee

to wage a defensive campaign

The correct answer should be to bring the war to a speedy end

Although he was against it at first, he understood that with a total war strategy, they could completely destroy any military resources that the enemy might use and this would prevent them from waging war since they wouldn't have resources.