What is the hardware requirement for a RingMaster client?

A.
Intel/AMD x86-compatible dual core processor, 2.0Ghz, 2GB RAM, 512 MB HD space

B.
Intel/AMD x86-compatible single core processor, 2.0Ghz, 2GB RAM, 512 MB HD space

C.
Intel/AMD x86-compatible single core processor, 2.0Ghz, 1GB RAM, 1024 MB HD space

D.
Intel/AMD x86-compatible dual core processor, 1.0Ghz, 1GB RAM, 512 MB HD space