The correct options are
A It must have at least 1,500 vascular plants as endemics.
C It must have 30% or less of its original natural vegetation.
To qualify as a biodiversity hotspot, a region must meet two strict criteria: It must have at least 1,500 vascular plants as endemics; it must have 30% or less of its original natural vegetation. In other words, it must be threatened.