Refer to the exhibit.

In the accompanying exhibit, SH3 and SH4 are able to optimize FTP and HTTP sessions between Client41 and
the respective application hosts Server31 and Server32. However, optimization does not happen for Client42
and these application hosts. A quick check on SH3 and SH4 registers neither optimized nor pass-through traffic
from Client42. Client42 is able to ping Client41 and the in-path address of SH4. Note that SH3 and SH4 are in
auto-discovery mode. What is the likely cause?

A.
The default gateway of Client41 is configured wrong

B.
The default gateway of Client42 is configured wrong

C.
The default gateway of SH3 is configured wrong

D.
The default gateway of SH4 is configured wrong

E.
The routing protocol between R3 and R4 is configured wrong