If xy = a, xz = b and yz = c, x + yx + zy + z

• A. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2abc</center></td></tr><tr><td style="text-align: center;">ab + bc ac</td></tr></table>
• B. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2abc</center></td></tr><tr><td style="text-align: center;">ab + ac bc</td></tr></table>
• C. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2abc</center></td></tr><tr><td style="text-align: center;">ac + bc ab</td></tr></table>
• D. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2abc</center></td></tr><tr><td style="text-align: center;">ab + bc + ac</td></tr></table>