What Prevented the Delhi Sultanate from Attempting to Extend the Reach

Multiple Choice

What prevented the Delhi sultanate from attempting to extend the reach of its power?

A) Its army was smaller and weaker than needed for a major expansion
B) It faced ongoing threats from Mongol armies on the northwestern frontier.
C) It was a self-contained unit, not interested in expansion.
D) It was focused on the problems created by a major drought.
E) Its religious beliefs forbid such actions.