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