Given below are four sentences in jumbled order. Select the option that gives their correct order.

A. Once on their way, the stones did not stop until they reached the bottom of the hill.

B. You had to be very careful not to start a landslide.

C. Loose stones rattled down the cliff.

D. And they took other stones with them, so that there was soon a cascade of stones.

Choose the correct answer from the options given below: