So we say a difficult or impossible job is like "herding   cats " In which of the following situations do we most probably use the expression "curiosity killed the cat"?
Someone always asked a lady her age or weight and it made her angry.
Someone promised to keep a secret but he failed to do so.
Someone won the first prize in an English singing competition and he felt very excited.
Someone tried to swim across the Yangtze River with his newly broken legs.