There are three activities in the project. Activity A will take five weeks, activity B will take six weeks, activity C will take seven weeks. Activity A will take one week before activity B starts. Activity C will take one week after activity B starts. How long will the project take to complete?项目有三个活动,A活动要5周,B活动要6周,C活动要7周,A活动完成1周后B才能开始,C活动要在B开始后一周才能开始,项目一共要多久能完成? A.
12 weeks 12周 B.
13 weeks 13周 C.
14 weeks 14周 D.
17 weeks 17周