Pick up the correct statement from the following

Q. Pick up the correct statement from the following:

A.            The incidental expenses of a miscellaneous character which could not be predicted during preparation of the estimate, is called contingencies

B.            Additional supervising staff engaged at work site, is called work charged establishment

C.            Detailed specifications specify qualities, quantities and the proportions of materials to be used for a particular item

D.            All the above

Answer: All the above