Respuesta :
The correct answer is A .
Preposition are words or short phrases that link nouns, pronouns, or phrases to other words within a sentence. They are normally placed directly in front of nouns or gerunds verbs.
NOTE:
A word that looks like a preposition but is actually part of a verb is called a particle
For armed man held up the bank
In this example, up is part of the verb held
![Ver imagen Hooveshalyard](https://us-static.z-dn.net/files/d24/f58299fc92df746e1a5e00ea14721e7f.png)