If x 0, y 0 and z 0 and1 + 1 + 1 + 1 + 1 + 1 + 1,x2y2z216xyyzzx

• A. x + y + z = 0
• B. x + y = z
• C. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> = 0</td></tr><tr><td style="text-align: center;">x</td><td style="text-align: center;">y</td><td style="text-align: center;">z</td></tr></table>
• D. x = y = z