The correct answer is B.
option A is for "Ellos" (they)
option C is for "yo" (I)
option D is for a third person but the conjugation works for "us." just try to translate the whole sentence: "The teacher gives us the books to the students." it does not make sense.
However, if we use "B" the sentence is written properly. "La profesora les da los libros a los estudiantes" The teacher gives the books to the students.
The answer is Me seco el pelo meaning I cut my hair.
Es que al rey no le gusta el chino
1. los estudiantes y yo vamos a estar en la cafeteria.
2. nosotros vamos a nadar en la piscina.
3. ellos van a visitar Panama.