Question

choose the option that uses commas correctly.
chagua chaguo linalotumia koma kwa usahihi.
olaf can sit, stand and sing on a horse.

Explanation:

In the sentence "Olaf can sit, stand and sing on a horse", the comma is used correctly to separate the first two items in a series (sit, stand) before the conjunction "and" which connects the last item (sing). This follows the rule of using commas to separate items in a list, especially when there are three or more items and the "Oxford comma" (or serial comma) usage here is appropriate as it clarifies the list of actions Olaf can do.

Answer:

Olaf can sit, stand and sing on a horse. (This option uses commas correctly to separate items in a series.)