How did Zollverein simplify currency issues among German states?

A. Common economic rules बनाकर / By creating common economic rules

Step 1: Identify the concept: this is economic integration. Step 2: Zollverein reduced trade barriers and currency differences to improve market coordination. Step 3: Remember Zollverein with economic unity.

Step 1: concept पहचानें: यह economic integration है। Step 2: Zollverein ने trade barriers and currency differences को reduce करके market coordination बढ़ाई। Step 3: Zollverein को economic unity से याद रखें।