Is that car safe? No, It's not safe ___ drive.

• A. Enough to
• B. Enough for
• C. Enough for driving
• D. Enough to drive

Answer: (A)

The main idea here is how to express sufficiency for an action after an adjective like safe. When you want to say something isn’t capable of doing something, you use enough followed by an infinitive: enough to + base verb.

In this sentence, the action is driving. So the natural completion is “enough to,” which gives the full phrase not safe enough to drive. That states clearly that the car isn’t safe for the act of driving.

Other options don’t fit as smoothly. “Enough for” would need a noun after it, but drive is a verb here. “Enough for driving” is possible but sounds less direct for this context. And “enough to drive” would duplicate the following word due to the sentence structure, making the sentence awkward or incorrect.