Answer:
C) Tan
Explanation:
It makes sense, tiene sentido. The other ones just don't fit in the sentence, they make it soind weird.
Answer:
Lupe: Necesito tu ayuda para entender este concepto de matemáticas.
Esteban: Yo te ayudaré a entenderlo.
The answer should be "La"
Do you need sentences? For those Spanish words?