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

A. 'The structure of the building depends on the purpose for which it is erected.
B. People who design a building keep in mind the purpose for which it is being erected.
C. Humans erect buildings for various purposes.
D. One building may require strength, another may require comfort, and a third may require space.

Choose the correct answer from the options given below: