Go with choice A. As for your most valued achievement, normally yes this should be work, although it could also be other things like community service. There are two things to look for here:
1. RESULTS - if you sold a billion dollars of stuff and were voted the best salesman of the year THAT is results!
2. Actions - What did you DO to get these results??? Did you just work alone in a room reading books? NOT a good story! did you instead LEAD 200 people to do this?? YES a great story!!!
Hope this helps!
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