In the Unified Model of Active Galactic Nuclei,the Broad Line

In the unified model of active galactic nuclei,the broad line region in an active galactic nucleus is

A) composed of clouds of gas and stars moving at very high orbital velocities.
B) composed of a super massive black hole.
C) responsible for producing the bright continuous radiation observed in blazars.
D) responsible for the narrow absorption lines seen in Type 2 Seyfert galaxies.
E) located further from the core than the narrow line emission region.