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

A: It is said that there was a shepherd named Magnes, who lived in ancient Greece. 

B: He would take a stick with him to control his herd. 

C: The stick had a small piece of iron attached at one end.

D: He used to take his herd of sheep and goats to the nearby mountains for grazing.