What did scholars study to them decipher hieroglyphics? a.. behistun rock. b.. cuneiform. c.. sumerian alphabet. d.. rosetta stone

Probably D. However I use Rosetta Stone to decipher other languages

The correct answer among all the other choice is D. Rosetta Stone. This is what scholars study to help them decipher hieroglyphics. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help. 

The word is used for the Iconoclastic Controversy that shook the Byzantine Empire for more than 100 years. Open hostility toward religious representations began in 726 when Emperor Leo III publicly took a position against icons; this resulted in their removal from churches and their destruction.