Suppose Host A wants to send a large file to host B. The path from Host A to Host B has three links, of rates R1 = 500 kbps, R2=2 Mbps, and R3 = 1 Mbps. Assuming no other traffic in the network, what is the throughput for the file transfer?

a) 1Mbps b) 500 kbps

c) 2 Mbps

d) 3.5 Mbps