Quiz: searching and editing text

Several correct answers

What follows from this output?

$ grep -oE 'status=[0-9]+' api.log | sort | uniq -c
     41 status=200
      7 status=404
      2 status=500

• A The log has three lines.
• B The log has 50 matches of status= with a number.
• C grep passed whole log lines to sort.
• D Status 500 is recorded twice.