The teachers will be able to visit our schools and compare our teaching methods to their own.

The teacher will be able to pay a visit to our schools and compare teaching methods for their own.

The teachers will be able to visit our schools and compare our teaching methods with their own.

The teachers will be able to visit our and compare their teaching method with their own.

C. The teachers will be able to visit our schools and compare our teaching methods with their own.

In option (b), use of 'pay a visit' for teachers is not right. In option (a), 'compare with' is better than 'compare to' for methods. 'Compare to' is used for persons. Option (d) does an illogical comparison of same methods of teachings of visiting teachers.