Multiple Users Are Experiencing Slow Performance When Downloading Large Files

Multiple users are experiencing slow performance when downloading large files from a specific site. Which of the following should the technician do to check the connection to the external site?

A) Check the latency by running a continuous ping to the site.
B) Perform the ipconfig/flushdns command on the affected users' PCs. Perform the ipconfig/flushdns command on the affected users' PCs.
C) Run a speedtest from a user's PC to a site on the Internet.
D) Verify if there is MTU mismatch in the path to the site.