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【单选题】
根据下列条件，回答 67～70 题： 某承受均布荷载的跨度IO=5m，截面尺寸b×h=200mm×500mm，混凝土强度等级为c20，箍筋为HPB235级，纵筋为HRB335级钢筋，单排纵向受力钢筋，跨为5m，as=40mm. 第 67 题 设箍筋为φ6@200双肢箍，支座边缘计算截面配弯起钢筋2φ16，弯起450，弯起点至支座边缘的距离为480mm，该承受的均布荷载设计值q最接近（ ）项数值。
A.
51.98kN/m
B.
69.2kN/m
C.
43.25kN/m
D.
56.93kN/m
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