Which quotation from the "the interlopers" indicates that von gradwitz and znaeym are willing to put their hatred for each other behind them?

From the conversation of von Gradwitz and Znaeym, it was evident in the statement made by one of them: 

‘How the whole region would stare and gabble if we rode into the market-square together.’

This statement meant that they are entertaining the idea of them working together and putting the past behind them.

The answer is d.  the north had organized schools, whereas the south had few organized schools.