Refer to the exhibit.

ACME Mining has four data centers in Santiago, Cape Town, Mumbai, and Beijing. They are full-mesh connected via a 400 Mb/s EVP-LAN. A 1-TB transfer occurs daily via FTP between the Santiago and Mumbai data centers. When testing, the data transfer took an ''unexpected and outrageous, with an average transfer rate of 47 KB/s. The team provided this information.

LAN bandwidth usage below 5% at both data centers during transfer.

WAN bandwidth usage was between 20-30% at both data centers during transfer.

The only QoS on WAN is KB/s strict priority configured for other types of traffic.

There is no QoS on LAN.

The ping RTT average between data centers is 378 milliseconds.

Which action improves the file transfer rate?