Answer:
C) tracert
Explanation:
Based on the information provided in the question with regards to the situation at hand, It can be said that the best TCP/IP utility to use to troubleshoot this would be a tracert. In the context of information technology and networking, this is a utility used in order to see and measure the transit route that your information is taking making it easy to detect any problems over the network between two systems, such as delays or drops in packets.
