单项选择题WhatistheminimumhardwareconfigurationofthemultishelfCiscoCRS-1system?()
A.one route processor (RP) Card and one modular services card (MSC)
B.one distributed route processor (DRP) and one S13 fabric card (SFC)
C.one line card chassis (LCC) and one fabric card chassis (FCC)
D.one route processor (RP) and one fabric card chassis (FCC)
E.one line card chassis (LCC) and one S13 fabric card (SFC)