Choose the best option that indicates a change of voice in the below sentence:
The students' problems were solved by the Director of Student Affairs after much effort.
1
The Director of Student Affairs solved the students’ problems after much effort.
2
The student’s problems were redressed by the Director of Student Affair
3
The problems had been addressed by the Director.
4
The Director of Student Affair was asked to solve students’ problems.
5
None of the above