What is the minimum hardware configuration of the multishelf Cisco CRS- 1 system?

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)