Company.com has encountered a problem on the HMC， which requires access to the root shell on the HMC. Which of the following is necessary to access the root userid on the HMC？（）

• A、Enable remote commands on the HMC Configuration menu,then use ssh to login to theHMC,enter su - root
• B、Login to the HMC as hscpe and run pesh,using a temporary password from IBM Support,afterward， enter su - root
• C、Login to the HMC as hscroot,then run pesh,using a temporary password from IBM Support, afterward,enter su - root
• D、Enable remote commands on the HMC Configuration menu，then telnet in as hscroot,entersu - root