This is a test of commonsense with single/multi-choices. Complete the next sentence:

A man is riding on a brown horse. he

pick from the following.
(i). jumps off the horse and grabs a calf.;
(ii). is grooming the horse's mane.;
(iii). is using a rope to tie his horse up.;
(iv). is chasing a big blue and white horse.;
The answer is:
(i).