The correct option is B crystalline
Crystalline structure refers to a fixed arrangement of the ions/ atoms/ molecules that make up a substance.
The smallest unit of a crystalline arrangement is known as "lattice". (It is comparable to the bricks, that when laid systematically, form a wall).
Some of the common crystalline structures are tetrahedral, hexagonal, rhombic, orthorhombic, etc. The structure of CuSO4 is orthorhombic.
Amorphous structure on the other hand, means no systematic arrangement of the constituent particles, such as in coal, charcoal, coke, etc.