human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "a survey of preferences in virtual machine placement"):
  Abstract: With the rapid developments of virtualization techniques, cloud data centers have had enabled cost effective, flexible, and customizable deployments of applications in virtualized infrastructure. Virtual machine placement problem is a problem of paramount importance to the design of cloud data centers. It aims to assign each virtual machine to a server in the cloud environment. Typically, the problem involves complex relations and multiple design factors as well as local policies that govern the assignment decisions. It also involves different parties including cloud administrators and customers that we need to consider their preferences while opting for a solution. Thus, it is significant to not only return an optimized solution to the underlying placement problem but also a solution that reflects the given preferences of these parties. In this paper, we provide a detailed review on the role of preferences in the current literature of the virtual machine placement problem. We further discuss some challenges and identify possible research opportunities to better incorporate preferences within the problem.

Includes members:
  Member "multi criteria virtual machine placement in cloud computing environments a literature review":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "a survey on the use of preferences for virtual machine placement in cloud data centers")
  Member "cp nets a tool for representing and reasoning with conditional ceteris paribus preference statements":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "on validating repairing and refining heuristic ml explanations")

Question: Please tell me which class the source paper belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.DC(Distributed, Parallel, and Cluster Computing)