Which statement is true about the HP Color LaserJet Enterprise CM4540 MFP intermediate paper
transport unit (IPTU)?

A.
The IPTU is a Customer Self Repair (CSR) part, designated as CSR-B.

B.
The IPTU contains a controller PCA with its own firmware.

C.
The IPTU supplies +/- 24 volts to the DC controller.

D.
The IPTU serves as the paper path between secondary transfer and the fuser.