Which sentence is punctuated correctly? (1 point)
For about 3 minutes, the helicopter hovered overhead, and then flew away, to the east.
On Monday I am going to go hiking but after that I will come by to visit you.
In 2019 eight new students enrolled in our school, but only five of them stayed.
After driving all day and night, we finally reached our destination, and we happily went to sleep.