Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.
A. Suddenly they fell into a deep pit someone had dug to trap foolish animals like them who weren’t watching where they were going.
B. Their wild squawking brought the other animals to the pit.
C. Ostrich and Emu were racing each other across the Australian outback.
D. Ostrich and Emu tried to jump out of the pit but it was too deep.

Going through the sentences, we can see that C sets the context of the discussed event. 
A and D would make a good chronological pair; the ostrich and emu fell into the pit (A), and then they tried to jump out of the pit but could not as it was too deep (D)

B serves as the conclusion of the paragraph, as after the ostrich and emu were trapped in the pit, their squawking brought other animals to the pit. 

CADB is the sequence in these sentences that should be arranged in order to make a logically coherent paragraph. 

Therefore, option C is the correct answer.