Pick up the correct statement from the following

A.

The theory of formation of concrete is based on the phenomena of formation of voids

B.

The bulking of sand is taken into account while volumetric proportioning of the aggregates

C.

The dry sand and the sand completely flooded with water, have practically the same volume

D.

The expansion and contraction joints are provided if concrete structures exceed 12 m in length

E.

All the above

Correct answer is E

No explanation has been provided for this answer.