[单选题]
Which of the following is ab;j. 6 9)bvyuxr yiv,t9:6vw:wnt wu(m kleofxfm9(e;-goi t)*j9nihe correct order for % ionic character from highest to ij wiltx( vnm-);f:*6 u99mfgwte k oew( on9:lowest for the following compounds?
A. $SiO_2$,$MgO$, $ZnO$,$Li_2O$
B. $Li_2O$,$MgO$, $ZnO$,$SiO_2$
C. $SiO_2$, $ZnO$,$MgO$, $Li_2O$
D. $ZnO$,$MgO$,$Li_2O$,$SiO_2$