An x445 can sustain up to two memory chip failures per memory bank， and in an 8-way with four memory banks， up to eight memory chip failures can be sustained.  Which combination of EXA features provides this functionality？（）

• A、ECC with Chipkill
• B、ECC with Memory Mirroring
• C、Chipkill with Memory ProteXion
• D、Memory ProteXion with Hot Spare Memory