The right option is; B. cytoskeleton
The grid-like lattice of proteins that gives the cell shape and support is the cytoskeleton.
The cytoskeleton is a system of interconnected tubules and filaments that reach out all through the cell, from the cytoplasm. The cytoskeleton is composed of filamentous proteins, and its main function is to give the cell its shape, and mechanical support that helps the cell to perform important functions like movement and division.