The local name of Mohenjodaro is "Mound of the Dead" (option C) because it refers to the archaeological site that was once a thriving city during the ancient Indus Valley Civilization. The name "Mohenjodaro" itself translates to "Mound of the Dead" in Sindhi, the local language of the region. Let's explore the reasons behind this name in detail:

1. Discovery and excavation:
- Mohenjodaro was discovered in 1922 by an archaeologist named R.D. Banerji.
- The site is located in present-day Pakistan, near the Indus River in the Sindh province.
- The excavation of the site uncovered a large mound, which was found to contain the remains of an ancient city.

2. Cemetery and burial practices:
- The presence of a large cemetery within the city's boundaries indicates that burial practices were an integral part of the culture.
- The cemetery consisted of several burial mounds where the dead were laid to rest.
- The presence of tombs and graves suggests that the city's inhabitants believed in an afterlife and had rituals and customs associated with death and burial.

3. Evidence of mass burials:
- Excavations at Mohenjodaro have revealed instances of mass burials, where multiple individuals were buried together.
- These mass burials indicate that the city may have experienced catastrophic events like epidemics, floods, or other disasters.
- The presence of mass burials could be one of the reasons why the local community named the site "Mound of the Dead."

4. Religious and spiritual significance:
- The people of the Indus Valley Civilization had a complex religious and spiritual belief system.
- The dead were believed to have a connection with the spiritual realm, and their burial practices may have reflected this belief.
- The name "Mound of the Dead" could also signify the religious and spiritual significance associated with the burial grounds of Mohenjodaro.

In conclusion, the local name of Mohenjodaro, "Mound of the Dead," is derived from the presence of burial mounds, evidence of mass burials, and the cultural significance of death and burial practices in the ancient Indus Valley Civilization.