Which sentence uses parallel structure?
A In the north the weather in winter is very cold, but it is warmer in the south in the winter.
In the north the weather in winter is very cold, but it is very much warmer in the south.
In the north the weather is very cold, but in the winter the southern weather is warm.
Din the north the weather in the winter is very cold, but in the south the weather in winter is very warm.
