<img src="https://static.zxtiku.com/wangke/imgs/topic/f49a12be59a0111c6e7d831ac5c0048a.jpg"/>项任务分配给<img src="https://static.zxtiku.com/wangke/imgs/topic/b7ab47aa5d69dd0a8fb989577e76fbc9.jpg"/>个人完成,<img src="https://static.zxtiku.com/wangke/imgs/topic/9477a9828c628c987e5b7699e65aafc4.jpg"/>,有多余人数. 每个人只能完成其中一项,每项任务只能分给一人完成,使总完成时间、费用最少,建立数学模型为( ) A. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/e72357acbf0ec75edcfe3164c1d894d2.jpg"/> B. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/e839db3724a0c785d7ee90bd97c1776b.jpg"/> C. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/2f400919e62573e494f90cd624bbd8ef.jpg"/> D. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/259839eff2b25db697974dcb2a166c22.jpg"/>