Which of the following statements are true?

When driving under ideal conditions at speeds slower than 40 mph, experienced drivers should maintain a following distance of at least two seconds. An inexperienced driver should maintain a following distance of at least three seconds. When driving under ideal conditions at speeds above 40 mph, drivers should increase their following distance to four or five seconds. Increase your following distance when anything makes conditions less than ideal.

• A two-second following distance may be sufficient under normal conditions for an experienced driver.
• An inexperienced driver should maintain at least a three-second following distance under normal driving conditions.
• At speeds of 40 mph or faster, a four- to five-second following distance is recommended.
• All of the above.