Answer:
d. ​All of these are correct.
Explanation:
All of them are correct answers. By sending positive notes to the house, you are encouraging a good relationship with the student and the parents stating how their relationship (teacher-student) is developing. By sending notes, parents know your presence and essence as the teacher. By calling them is a more personal approach because it is a live feedback. You may “break the ice” by introducing yourself and that the parents get to know the teacher of their children in a more personal way. By inviting the parents into the classroom is the final move, because you get to meet them in person and have a more personal relationship with them, and parents could feel more “relax” after they meet you.