A customer complains of slow performance with fs_copy and fs_replicate. Analysis of tcpdump shows very high retransmission rate. Param RCP tcpwindow is currently set to default. Round trip latency is about 3ms. The customer wants about 5MB/sec throughput.

What would be the most probable tcpwindow size to use to improve performance?

A.
16K

B.
128K

C.
32K

D.
64K