题目8单选题
下列运输问题的最优运输方案为:<img src="https://tihai-oss-cloud.itihey.com/img/a4eab5d49a6985fa329c8fb825e5be64.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/e7f80490e360912a8d031709f0baa2f8.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/f3a9abda10eea064bbe2acfe22513eb9.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/2c1ebddb960588c18b9565a50b574c0e.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/e3d97483c1e6489d4794dfdf9a4169ed.png">