一座三跨混凝土连续梁桥（跨度布置为A米＋B米＋A米），当主跨跨度B为120米时，边跨的跨度A最合适的选择为：________ 。

A、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: ">60米<span style="mso-spacerun: yes"></span></span>

B、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: ">80米<span><p></p></span></span>

C、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: ">120米<span style="mso-spacerun: yes"></span></span>

D、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: ">150米<span><p></p></span></span>