Answer:
A. replace the network cable
Explanation:
Based on the information provided within the question it can be said that in this scenario the best option would be to replace the network cable. The network cable refers to the Ethernet cable that is connected to the individuals personal computer. This cable being faulty is most likely the reason as too why the individual is not able to connect. Since it is displaying that signals return too early it means that there is most likely information being lost in transit.
the reason HTML seems to work even if it has syntax errors is due to browser having built in ways to parse the code meaning it will still show but most likely look way different then you would want.
the code may turn pink due to syntax errors
the main reason it to create flash card is the first one
I believe the answer is D. It makes more sense and is the most correct grammatically.
Hope this helped and pls mark as brainliest!
~ Luna