Question

preposiciones, conjunciones y adverbios
adverbio de cantidad
bien
también
jamás
tan
mal
porque

Explanation:

The task is to select the Spanish adverb of quantity. "tan" is an adverb that expresses quantity/degree, while the others are adverbs of manner ("bien", "mal"), frequency/negation ("jamás", "también"), or a conjunction ("porque").

Answer:

tan