There is not much of a difference and depends on your preferences as either a reader or a movie watcher
i like the movie more
If unqqr means sloop then etcor means cramp.
My Spanish teacher <u>who wears flowers in her hair</u> is very pretty . The underlined pattern is the adjective clause. It is a clause because it is a sentence; it has got a subject : <em>who</em>, and a predicate: <em>wears flowers in her hair. </em>This clause works as an adjective because it qualifies the subject of the main sentence : <em>My Spanish teacher</em>. The adjective clause gives some specific information about the Spanish teacher.
Your first option is correct.
EXPLANATION:
your first option is correct because this is a grammar question. When you use "an" you're using it in front of a vowel. The only sentence starting with a vowel is the first one. The others don't sound right when you use "an" in front of it instead of "a".
I hope I helped! :)