当a=2,b=3,c=4时,3a+bc+ab的值是 请选择ABCD;}6I5t9q-f1z9i.S'P*`5C2x6F,].a8V8x9])o/m5V/x
A.238x9])o/m5V/x
B.248x9])o/m5V/x
C.188x9])o/m5V/x
D.218x9])o/m5V/x