What is the minimum number of single ported 2-gigabit HBAs required to get the maximum throughput?

You have a 64-bit PCI-X 133 MHz server. The burst rate of a 133 MHz bus is 1064 MB/s. What is
the minimum number of single ported 2-gigabit HBAs required to get the maximum throughput?

A.
two

B.
three

C.
six

D.
four