Here's why:

* Central atom: Carbon (C)

* Valence electrons: Carbon has 4 valence electrons, and sulfur has 6 valence electrons each.

* Bonding: Carbon forms double bonds with each sulfur atom.

* Lone pairs: The central carbon atom has no lone pairs of electrons.

Since there are two bonding pairs and no lone pairs around the central carbon atom, the electron pairs repel each other, resulting in a linear arrangement.

Key point: The electronic geometry is determined by the arrangement of *all* electron pairs around the central atom, including both bonding and lone pairs.