What indicated that the citadel in mohenjo daro was a center of political and ritual activities?

The correct answer to this question is the letter A. It says that the Citadel in Mohenjo Daro in Pakistan is a housed well-made public facility, such as the Great Bath. It means the "earliest public water tank of the ancient world". Great Bath is a structure that is known among the ruins of the ancient Indus Valley Civilization.

It housed well-made public facilities, such as the great bath.

The citadel was located in ancient Indus valley civilization. Large building structures and houses in the citadel suggests it was used for public gathering as well as rituals which often associated politics those days.