12.下列何種雲端服務要透過撰寫程式的方式來使用？(A)基礎架構即服務(Infrastructure as a Service, IaaS)(B)平台即服務(Platform as a Service, PaaS)(C)軟體即服務(Software as a Service, SaaS)(D)資料即服務(Data as a Service, DaaS)