Must gradually change to the right lane + if there is a speeding lane, you must run in that lane first.
Answer 2 is incorrect because of immediate change (immediate change is different from gradual change because not guaranteed).
Must gradually change to the right lane, if there is a deceleration lane, let the vehicle move in that lane before leaving the expressway.
Immediately change to the right lanes, if there is a deceleration lane, the vehicle must move in that lane before leaving the expressway.