单选题：The following figure shows the AOE network of a project with 8 a

The following figure shows the AOE network of a project with 8 activities. The earliest and the latest completion times of the activity `d` are __, respectively. @[C](2)


A. 3 and 7
B. 12 and 12
C. 12 and 14
D. 15 and 15




A.3 and 7
B.12 and 12
C.12 and 14
D.15 and 15


答案：C