Read the sentence. her premature arrival at her own surprise party almost ruined everything! what does premature mean? arrive before, or early arrive after, or late arrive on time not arrive, or absent

Early arrival

Explanation:

Since the party is meant to be a surprise for her she's supposed to arrive after everything has been set. The purpose of it all is to catch her unaware, like entering your room, you turn on the lights and then you hear screams of delight renting the air. That's a surprise. However, she arrived before the 'surprise party' is perfect, the surprise is ruined.