ExtremeProgramming(XP)isadisciplineofsoftwaredevelopmentwith()ofsimplicity,communication,feedbackandcourage.Successfulsoftwaredevelopmentisateameffort-notjustthedevelopmentteam,butthelargerteamconsistingofcustomer,managementanddevelopers.XPisasimpleprocessthatbringsthesepeopletogetherandhelpsthemtosucceedtogether.XPisaimedprimarilyatobject-orientedprojectsusingteamsofadozenorfewerprogrammersinonelocation.TheprinciplesofXPapplytoany()projectthatneedstodeliverqualitysoftwarerapidlyandflexibly.2011-AnXPprojectneedsa(请作答此空)customertoprovideguidance.Customers,programmers,managers,areallworking()tobuildthesystemthat'sneeded．Customers-thosewhohavesoftwarethatneedstobedeveloped-willlearnsimple,effectivewaysto()whattheyneed,tobesurethattheyaregettingwhattheyneed,andtosteertheprojecttosuccess.
A.part-time]
B.casual
C.seldom
D.full-time]
正确答案是D