Must engage 1, to gradually increase the throttle for the car to come out of the track, without increasing gear.
Answer 1 is wrong because there is increase, answer 2 is wrong because there is no set number 1
Put the first gear (1) and slowly let the two front wheels into the groove, increase the throttle for the front two wheels to go out of the groove, increase the gear, increase the speed so that the rear wheel passes the groove.
Increase the throttle, increase the gear so that the front and rear wheels pass out of the groove and run normally.
Put the first gear (1) and slowly let the two front wheels down to the groove, increase the throttle for the front two wheels to go out of the groove, continue to let the rear wheel slowly down the groove and then gradually increase the throttle for the car paint over the groove.