Based on the facts presented in the riddle of the rosetta stone, the rock slab is called the "rosetta stone” because it is named in honor of a famous egyptian pharaoh. in honor of the mother of napoleon. after the french army officer who uncovered it. after the town near where it was discovered.

The rock slab is called the "Rosetta stone” because it is named after the town near where it was discovered.

Option D

Explanation:

Rosetta stone is big rock stele which was discovered in a village in Rosetta (Rashid) in Egypt in 1799 by soldiers of France. As it was found in Rosetta hence it was named after the town.

It is believed that the carving on the stone was done in 196 B.C. using two distinct languages and three different scripts.  The languages used for writing on the stone were Greek and Egyptian whereas the scripts used were Greek, Hieroglyphic and Demotic.