In the Absence of Arabinose, the Regulatory Protein AraC

In the absence of arabinose, the regulatory protein AraC

A) forms a dimer, binds to two regulatory sequences near the promoter, and activatestranscription of the arabinose operon structural genes.
B) forms a dimer, binds to two distant sites, and forms a DNA loop that blocks access of RNApolymerase to the arabinose operon promoter.
C) binds to the arabinose operator and represses transcription of the arabinose operonstructural genes
D) binds to the arabinose operator and represses transcription of the arabinose operonstructural genes.