Which Statement Describes the Role of the Upstream Promoter (UP) $\sigma$

Which statement describes the role of the upstream promoter (UP) element in E. coli?

A) It increases transcription by binding to all $\sigma$ subunits.
B) It decreases transcription by binding to all $\sigma$ subunits.
C) It increases transcription by binding to a specific $\sigma$ subunit.
D) It increases transcription by binding to RNA polymerase.
E) It decreases transcription by inhibiting binding by RNA polymerase.