The four sentences labelled A, B, C and D, given below in jumbled order, together form a coherent paragraph. Arrange the sentences in the most logical order and choose the sequence that produces the best paragraph.

A. The committee began by desilting the old village tank well before the first showers arrived.
B. After three failed monsoons in a row, the villagers of Kharwadi decided to stop depending on water tankers.
C. Within two years, the recharged wells were supplying water even through the driest weeks of summer.
D. They formed a water committee and mapped every stream, slope and depression around the village.