all except " is okay unless you are writing something that will be sold" and possibly "can lead to serious punsishment"
Who is this he ?
Without this we can not answer the question
B. it is b because you could separate them such as: I smelled something. And I went down to the kitchen
Answer:
A gerund ends in -ing So I would say the last option- Her only regret is not dancing at the wedding.Explanation: