Which of the following words is closest in meaning to “Obviate”?

Obviate means to remove a need or difficulty.

• Correct answer - to make unnecessary: it has the same meaning as Obviate.
• indispensable: absolutely necessary - wrong, it does not mean the same as Obviate.
• slow to understand: taking a long time to grasp things - wrong, it does not mean the same as Obviate.
• to point out: to draw attention to - wrong, it does not mean the same as Obviate.