I think it’s
1st: me
2nd: ducho
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.
I tried answering but it didnt allow me cause of some words but I'm not sure why..
1-eran
2-fue
3-fue
4-estaba
5-jugaba
6-empezó