All of the following are characteristics of a work package EXCEPT:

A) It is a deliverable or project work component at the lowest level of each branch of the work breakdown structure.
B) It is a summary task at the top level of the WBS.
C) It includes the schedule activities required for completion of the deliverable or project work component.
D) It includes the schedule milestones required for completion of the deliverable or project work component.

酒店的洗衣服务的种类包括哪三种？（）

A、干洗、烘干、手洗

B、普通、加急、机洗

C、干洗、水洗、净烫