Let’s do it at once, ? prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace> A. shall we B. will you C. do we D. do you prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace> B. will you C. do we D. do you prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>