Why does the flower girl keep insisting that she can pay? A) Money is at the heart of the conflict. B) She is proud of all her hard work and effort. C) She knows Mr. Higgins will turn her away without money. D) She wants to be seen as being as good as any other lady.

Money is at the heart of the conflict.

Explanation:

Eliza (the girl) was insisting to pay for her lessons even though Higgins did not demand it. It was due to the hesitation of Higgins to teach her to speak gently. Eliza deciphered this as Higgins reluctance of not working for free since he must have thought that poor flower girl won't have enough to pay for his speaking course.

To clear the air regarding the same, Eliza kept insisting for following a professional approach where she would pay for her speaking course.