What is the required FlashBlade configuration?

An architect need to create capacity sizing of FlashBlade to move data from a 6-year old EMC-Dell Isilon.

The current Isilon solution consumes almost 1.3PB.

There are three workloads:

– Warehouse application (40 TB, estimated compression ratio 2:1, IO size 8K)

– Images (20 TB, estimated compression ratio 1.0:1 average image size 1M)

– Log files (40 TB, estimated compression ratio 4:1, average file size 4k)

What is the required FlashBlade configuration?
A . 7x17TB blades
B. 15x17TB blades
C. 15x52TB blades
D. 42x52TB blades