What is the most logical next event?

A still image of an individual standing by a horse is shown. Two people ride horses down a forest path. One of the people stops the horse and dismounts. the person

Possible answers:
[+] remounts the horse and continues riding down the path..
[+] enjoys a refreshing drink and makes a final turn and dismounts the horse..
[+] then ties up the animals legs..
[+] then pulls out a tack and holds onto it while kneeling down..
remounts the horse and continues riding down the path.