The teacher has the primary responsibility for adjusting their professional practice to classroom needs.
Why C fits: The teacher can reflect on difficulties, adapt teaching methods, improve communication, and seek support.
Why the others are weaker: Children, the principal, and the community influence the environment, but they cannot make the teacher’s professional adjustments on their behalf.
Practical point: Adjustment does not mean handling every problem alone. It means responding constructively while maintaining standards and involving school leadership when necessary.