ExtremeProgramming(XP)isadisciplineofsoftwaredevelopmentwith___1__ofsimplicity,communication,feedbackandcourage.Successfulsoftwaredevelopmentisateameffort-notjustthedevelopmentteam,butthelargerteamconsistingofcustomer,managementanddevelopers.XPisasimpleprocessthatbringsthesepeopletogetherandhelpsthemtosucceedtogether.XPisaimedprimarilyatobject-orientedprojectsusingteamsofadozenorfewerprogrammersinonelocation.TheprinciplesofXPapplytoany__2___projectthatneedstodeliverqualitysoftwarerapidlyandflexibly.AnXPprojectneedsa(an)__3___customertoprovideguidance.Customers,programmers,managers,areallworking___4__tobuildthesystemthat'sneede D．Customers-thosewhohavesoftwarethatneedstobedeveloped-willlearnsimple,effectivewaysto___5__whattheyneed,tobesurethattheyaregettingwhattheyneed,andtosteertheprojecttosuccess. 3、_____
A.part-time
B.casual
C.seldom
D.full-time
正确答案是D