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A security analyst is reviewing the logs from an internal chat server. The chat.log file is too large to review manually, so the analyst wants to create a shorter log file that only includes lines associated with a user demonstrating anomalous activity. Below is a snippet of the log:

Which of the following commands would work BEST to achieve the desired result?
- grep -v chatter14 chat.log
- grep -i pythonfun chat.log
- grep -i javashark chat.log
- grep -v javashark chat.log
- grep -v pythonfun chat.log
- grep -i chatter14 chat.log
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