>The usual answer to this is that you can reorganize your stuff, and group your related functionality into a separate class. So if A is having dependent methods K and L which are not used anywhere else, it may be a good moment to think of a new class which will have new methods: A, K and L, and the A method in the orginal class will simply call the A method of an object based on this new class.

I will give you "may be a good moment...", that leaves room for "may not." At times I think it would be better to keep everything in one place.