Refer to the exhibit. After this new OSPF design with per-packet load balancing was
implemented, Host A reported that large file downloads from Server A became slow and
sometimes failed. The operations team discovered that packets are arriving out of order on R1.
Which cost-conscious redesign action will fix the issue?

A.
Upgrade all links to 10 Gb/s.

B.
Adjust MTU sizes to 1500 on all interfaces.

C.
Adjust the OSPF auto-cost reference bandwidth on R4.

D.
Adjust the OSPF auto-cost reference bandwidth on all routers.