Ответ:

  1. No, Clara was not very kind. She treated the flower girl rudely and complained about the money spent on her.
  2. The flower girl probably felt upset, embarrassed and angry because her flowers were ruined and she had lost a chance to earn money.
  3. Clara thought her mother had wasted a sixpence because the flower girl’s flowers had fallen into the mud, so the money seemed to have been spent for nothing.
  4. The flower girl appears to have had a poor and difficult upbringing. Her speech and manners suggest that she has had little education.

If I were in Clara’s position, I would speak politely, help the flower girl collect or replace the flowers and give her fair payment.