Which Statement Is True of the Delhi Sultanate in the 1200s

Which statement is true of the Delhi sultanate in the 1200s?

A) lasted until conquered by the Mongols in the 1530s
B) were less than successful in forcing their Hindu subjects to convert to Islam
C) was established by a group operating out of a base in Iran
D) was headed by a powerful Hindu ruler of central India
E) found that the only thing they shared with their subjects was language, which could not overcome religious differences