How Do the Core Enzyme and the Holoenzyme of RNA

Multiple Choice

How do the core enzyme and the holoenzyme of RNA polymerase differ in E. coli ?

A) The holoenzyme includes the sigma ( σ ) subunit, the core enzyme does not.
B) The core enzyme includes the sigma ( σ ) subunit, the holoenzyme does not.
C) The holoenzyme transcribes from an RNA template, the core enzyme from a DNA template.
D) The core enzyme transcribes from an RNA template, the holoenzyme from a DNA template.