Respuesta :

The first choice is correct because the second choice is a fragment, and the third is an incomplete thought. Also a fragment I guess.
the first one is correct because it has a noun and a verb

2nd one is not because it has a noun or subject but no verb, no action
a skirt, ya, so what

3rd it is missing the verb, it should be like 'jenny was preparing for...'
not complete



answer is the first one